Examples with solutions for Slope: Calculate the slope from two points

Exercise #1

Given the linear function:

y=6x y=-6x

What is the rate of change of the function?

Video Solution

Step-by-Step Solution

To solve this problem, let's follow these steps:

  • Step 1: Identify the form of the given function
  • Step 2: Compare the equation with the standard slope-intercept form
  • Step 3: Extract the value of the slope from the equation

Now, let's work through each step:

Step 1: The given linear function is y=6x y = -6x . This is presented in the form y=mx+b y = mx + b , where m m is the slope and b b is the y-intercept.

Step 2: Comparing y=6x y = -6x with y=mx+b y = mx + b , we see that the equation lacks a constant term, indicating b=0 b = 0 . The slope m m is the coefficient of x x .

Step 3: The coefficient of x x is 6-6, so the slope m m is 6-6. Thus, the rate of change of the function is 6-6.

Therefore, the solution to the problem is m=6 m = -6 .

Answer

m=6 m=-6

Exercise #2

Given the linear function:

y=102x y=10-2x

What is the rate of change of the function?

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Recognize the given function y=102x y = 10 - 2x and compare it to the standard linear form y=mx+b y = mx + b .
  • Step 2: Identify the coefficient of x x which is 2 -2 .
  • Step 3: Understand that this coefficient 2 -2 is the slope or rate of change of the function.

Now, let's work through each step:
Step 1: The linear function provided is y=102x y = 10 - 2x .
Step 2: Comparing this with the standard linear form y=mx+b y = mx + b , we see that the coefficient of x x is 2 -2 .
Step 3: Therefore, the rate of change (or the slope) of the function is m=2 m = -2 .

Thus, the rate of change of the linear function is m=2 m = -2 .

Answer

m=2 m=-2

Exercise #3

Given the linear function:

y=2x+1 y=-2x+1

What is the rate of change of the function?

Video Solution

Step-by-Step Solution

To determine the rate of change of the function given by the equation y=2x+1 y = -2x + 1 , we will follow these steps:

  • Step 1: Recognize that the equation is written in slope-intercept form, y=mx+b y = mx + b , where m m is the slope, or rate of change.
  • Step 2: Identify the coefficient of x x in the given equation. Here, the equation y=2x+1 y = -2x + 1 reveals that the coefficient of x x is 2-2.

This coefficient 2-2 directly represents the slope m m of the function.

Therefore, the rate of change of the function is m=2 m = -2 .

Answer

m=2 m=-2

Exercise #4

Given the linear function:

y=14x+13 y=14x+13

What is the rate of change of the function?

Video Solution

Step-by-Step Solution

To solve this problem, we need to find the rate of change, which is represented by the slope of the linear function.

The function provided is in the form y=mx+b y = mx + b , where m m is the slope. This is known as the slope-intercept form of a linear equation.

Given the equation y=14x+13 y = 14x + 13 , we can directly identify that the coefficient of x x , which is 14, represents the slope m m , or the rate of change of the function.

Therefore, the rate of change, or the slope, of this function is m=14 m = 14 .

Answer

m=14 m=14

Exercise #5

Given the linear function:

y=73x y=7-3x

What is the rate of change of the function?

Video Solution

Step-by-Step Solution

To identify the rate of change of the linear function y=73x y = 7 - 3x , we need to determine the slope of the equation.

The given function is in the form of y=mx+b y = mx + b , where m m is the slope or rate of change.

In the equation y=73x y = 7 - 3x , we notice that it can be rewritten as y=3x+7 y = -3x + 7 . Comparing this with the standard form y=mx+b y = mx + b , we find that the coefficient of x x is -3, meaning m=3 m = -3 .

Therefore, the rate of change of this linear function is 3-3.

Thus, the correct answer is m=3 m = -3 .

Answer

m=3 m=-3

Exercise #6

Given the linear function:

y=16+16x y=16+16x

What is the rate of change of the function?

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Identify the standard form of the linear function.
  • Determine the coefficient of x x , which is the slope m m .

Now, let's work through each step:

Step 1: The given linear function is y=16+16x y = 16 + 16x , which is in the form y=mx+b y = mx + b .

Step 2: In this function, the coefficient of x x is 16 16 . This coefficient is the slope m m of the function.

Therefore, the rate of change of the function, or the slope, is m=16 m = 16 .

Answer

m=16 m=16

Exercise #7

Given the linear function:

y=14+5x y=14+5x

What is the rate of change of the function?

Video Solution

Step-by-Step Solution

To determine the rate of change of the linear function y=14+5x y = 14 + 5x , we need to identify the structure of the equation. We notice that it is given in the slope-intercept form y=mx+b y = mx + b , where m m is the slope or the rate of change.

In the equation y=14+5x y = 14 + 5x , the term involving x x is 5x 5x . Thus, the coefficient of x x , which is 5 5 , represents the rate of change or slope of the function.

Therefore, the rate of change of the function is m=5 m = 5 .

Answer

m=5 m=5

Exercise #8

In the drawing of the graph of the linear function passing through the points A(0,7) A(0,7) and
B(8,3) B(8,-3)

Find the slope of the graph.

A(0,7)A(0,7)A(0,7)B(8,-3)B(8,-3)B(8,-3)CCCxy

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify the coordinates of the points.

  • Step 2: Apply the slope formula.

  • Step 3: Perform the arithmetic to calculate the slope.

Let's work through each step:

Step 1: Identify the given points:
Point A A is (0,7) (0, 7) and Point B B is (8,3) (8, -3) .

Step 2: Use the slope formula, which is: m=y2y1x2x1 m = \frac{y_2 - y_1}{x_2 - x_1}

Substituting the coordinates of points A A and B B :
Here, (x1,y1)=(0,7) (x_1, y_1) = (0, 7) and (x2,y2)=(8,3) (x_2, y_2) = (8, -3) .

Step 3: Calculate the slope:
m=3780=108=54 m = \frac{-3 - 7}{8 - 0} \\ = \frac{-10}{8} \\ = -\frac{5}{4}

Therefore, the slope of the graph is 54 -\frac{5}{4} .

Answer

54 -\frac{5}{4}

Exercise #9

In the drawing of the graph of the linear function passing through the points A(2,10) A(2,10) y B(5,4) B(-5,-4)

Find the slope of the graph.

A(2,10)A(2,10)A(2,10)CCCB(-5,-4)B(-5,-4)B(-5,-4)xy

Video Solution

Step-by-Step Solution

To find the slope of the graph of the linear function passing through points A(2,10) A(2,10) and B(5,4) B(-5,-4) , we use the slope formula:

The slope formula is given by:

m=y2y1x2x1 m = \frac{y_2 - y_1}{x_2 - x_1}

Substitute (x1,y1)=(2,10) (x_1, y_1) = (2, 10) and (x2,y2)=(5,4) (x_2, y_2) = (-5, -4) :

m=41052 m = \frac{-4 - 10}{-5 - 2}

Calculate the differences:

y2y1=410=14 y_2 - y_1 = -4 - 10 = -14

x2x1=52=7 x_2 - x_1 = -5 - 2 = -7

Substitute these into the slope formula:

m=147 m = \frac{-14}{-7}

Simplify:

m=147=2 m = \frac{-14}{-7} = 2

Therefore, the slope of the graph is 2 2 .

Answer

2 2

Exercise #10

In the drawing of the graph of the linear function passing through the points A(3,2) A(-3,2) y B(3,2) B(3,2)

Find the slope of the graph.

A(-3,2)A(-3,2)A(-3,2)B(3,2)B(3,2)B(3,2)CCCDDDxy

Video Solution

Step-by-Step Solution

To determine the slope of the line passing through points A(3,2) A(-3, 2) and B(3,2) B(3, 2) , we will use the slope formula:

The slope m m is calculated as:

m=y2y1x2x1 m = \frac{y_2 - y_1}{x_2 - x_1}

Substituting the values from points A(3,2) A(-3, 2) and B(3,2) B(3, 2) , we get:

m=223(3)=06=0 m = \frac{2 - 2}{3 - (-3)} = \frac{0}{6} = 0

The calculation shows that the difference in y y -coordinates is zero, hence dividing by any non-zero number will result in a slope of zero. This indicates a horizontal line on the graph.

Therefore, the slope of the line is 0 0 .

Answer

0

Exercise #11

In the drawing of the graph of the linear function passing through the points A(0,10) A(0,-10) y B(4,1) B(4,1)

Find the slope of the graph.

A(0,-10)A(0,-10)A(0,-10)CCCB(4,1)B(4,1)B(4,1)xy

Video Solution

Step-by-Step Solution

To solve this problem, we need to calculate the slope of the line passing through the points A(0,10) A(0, -10) and B(4,1) B(4, 1) .

The formula for the slope m m of a line that passes through two points (x1,y1) (x_1, y_1) and (x2,y2) (x_2, y_2) is:

m=y2y1x2x1 m = \frac{y_2 - y_1}{x_2 - x_1}

Given the points A(0,10) A(0, -10) and B(4,1) B(4, 1) , we identify:

  • x1=0,y1=10 x_1 = 0, y_1 = -10
  • x2=4,y2=1 x_2 = 4, y_2 = 1

Substituting these values into the slope formula, we have:

m=1(10)40 m = \frac{1 - (-10)}{4 - 0}

This simplifies to:

m=1+104=114 m = \frac{1 + 10}{4} = \frac{11}{4}

The fraction 114\frac{11}{4} can be converted to a mixed number:

114=234 \frac{11}{4} = 2\frac{3}{4}

Therefore, the slope of the graph is 234 \bm{2\frac{3}{4}} .

Answer

234 2\frac{3}{4}

Exercise #12

In the drawing of the graph of the linear function passing through the points A(0,7) A(0,7) y B(4,9) B(-4,-9)

Find the slope of the graph.

A(0,7)A(0,7)A(0,7)CCCxyB(-4, -9)

Video Solution

Step-by-Step Solution

To find the slope (m m ) of the line passing through the points A(0,7) A(0,7) and B(4,9) B(-4,-9) , we apply the slope formula:

m=y2y1x2x1 m = \frac{y_2 - y_1}{x_2 - x_1}

First, assign the coordinates to the two points:

  • (x1,y1)=(0,7)(x_1, y_1) = (0, 7)
  • (x2,y2)=(4,9)(x_2, y_2) = (-4, -9)

Next, substitute these into the slope formula:

m=9740 m = \frac{-9 - 7}{-4 - 0}

Simplify the expression:

m=164 m = \frac{-16}{-4}

The negative signs in the numerator and denominator cancel out:

m=164 m = \frac{16}{4}

Finally, divide to find the slope:

m=4 m = 4

Therefore, the slope of the line passing through points A(0,7) A(0,7) and B(4,9) B(-4,-9) is 4 4 .

Answer

4 4

Exercise #13

Find the slope of the line I I

III(2,5)(10,1)XY

Video Solution

Answer

m=2 m=2

Exercise #14

ABCD is a square.

Calculate the slope of the line DC.

A(0,10)A(0,10)A(0,10)BBBCCCDDD(-2,5)

Video Solution

Answer

m=25 m=-\frac{2}{5}