Given the function of the graph.
What are the areas of positivity and negativity of the function?
Given the function of the graph.
What are the areas of positivity and negativity of the function?
When we are asked what the domains of positivity of the function are, we are actually being asked at what values of X the function is positive: it is above the X-axis.
At what values of X does the function obtain positive Y values?
In the given graph, we observe that the function is above the X-axis before the point X=7, and below the line after this point. That is, the function is positive when X>7 and negative when X<7,
And this is the solution!
Positive 7 > x
Negative 7 < x