Choose the Correct Graph: Which Function Passes Through (6,80)?

Function Evaluation with Point Verification

Choose the graph of the function that passes through the point (6,80) (6,80)

❤️ Continue Your Math Journey!

We have hundreds of course questions with personalized recommendations + Account 100% premium

Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:04 Let's see if the point lies on the line.
00:07 Each point has two numbers: the left one is for X, and the right one is for Y.
00:14 Now, we'll substitute the point into the line equation to check if it works.
00:19 Remember, always solve what's inside parentheses first.
00:24 It works perfectly, so the point is on the line!
00:27 And that's how we solve the problem!

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Choose the graph of the function that passes through the point (6,80) (6,80)

2

Step-by-step solution

We want to find which function passes through the point (6,80) (6, 80) . This means we need the function to satisfy the equation y=80 y = 80 when x=6 x = 6 .

Let's evaluate the candidate functions one by one:

  • Function 1: y=5(x+10) y = 5(x + 10)
    Substitute x=6 x = 6 : y=5(6+10)=5×16=80 y = 5(6 + 10) = 5 \times 16 = 80 .
    This function gives the correct output, so it passes through the point (6,80) (6, 80) .

  • Function 2: y=x y = x
    Substitute x=6 x = 6 : y=6 y = 6 .
    The output 6 6 is not equal to 80 80 , so this function does not pass through (6,80) (6, 80) .

  • Function 3: y=2x+3 y = 2x + 3
    Substitute x=6 x = 6 : y=2(6)+3=12+3=15 y = 2(6) + 3 = 12 + 3 = 15 .
    The output 15 15 is not equal to 80 80 , hence this function does not pass through (6,80) (6, 80) .

  • Function 4: y=125x y = 12 - 5x
    Substitute x=6 x = 6 : y=125(6)=1230=18 y = 12 - 5(6) = 12 - 30 = -18.
    The output 18-18 is not equal to 80 80 , hence this function does not pass through (6,80) (6, 80) .

After checking all options, the function y=5(x+10) y = 5(x + 10) is the only one that satisfies the condition. Therefore, the correct answer is y=5(x+10) y = 5(x + 10) .

3

Final Answer

y=5(x+10) y=5(x+10)

Key Points to Remember

Essential concepts to master this topic
  • Point Substitution: Replace x with 6 and check if y equals 80
  • Technique: Calculate y=5(6+10)=5×16=80 y = 5(6 + 10) = 5 \times 16 = 80
  • Check: Only one function should give y = 80 when x = 6 ✓

Common Mistakes

Avoid these frequent errors
  • Not substituting the x-value correctly into the function
    Don't forget to substitute x = 6 into every part of the function = wrong calculation! Students often miss parts like (x + 10) and just substitute into x alone. Always replace every single x in the function with the given value.

Practice Quiz

Test your knowledge with interactive questions

Which statement best describes the graph below?

xy

FAQ

Everything you need to know about this question

What does it mean for a function to pass through a point?

+

When a function passes through a point like (6, 80), it means that when you substitute x = 6 into the function, you get y = 80. The point lies exactly on the function's graph!

Do I need to check all the answer choices?

+

Yes, absolutely! Even if the first function works, check all options to make sure only one function gives the correct y-value. This confirms your answer is right.

What if I get the wrong y-value when substituting?

+

If substituting x = 6 gives you any number other than 80, then that function does not pass through the point (6, 80). Keep checking until you find the function that gives exactly y = 80.

How do I handle functions with parentheses like y = 5(x + 10)?

+

Follow the order of operations! First substitute x = 6: y = 5(6 + 10). Then solve inside parentheses: y = 5(16). Finally multiply: y = 80.

Can more than one function pass through the same point?

+

Yes, multiple functions can pass through the same point! But in multiple choice questions, usually only one answer choice will be correct for the given point.

🌟 Unlock Your Math Potential

Get unlimited access to all 18 Linear Functions questions, detailed video solutions, and personalized progress tracking.

📹

Unlimited Video Solutions

Step-by-step explanations for every problem

📊

Progress Analytics

Track your mastery across all topics

🚫

Ad-Free Learning

Focus on math without distractions

No credit card required • Cancel anytime

More Questions

Click on any question to see the complete solution with step-by-step explanations