The area of Brian’s rectangular garden, in square feet, can be found by using the following expression of 6(2x+5y).

So basically what they’re asking you to do is just label the x-axis and the y-axis so you can explain a relationship between two corresponding things.

For example you could put “time (seconds)” for the bottom axis and then on the left put “distance (m)” and say you’re talking about how far a car has driven for it’s speed, and then for your true statement you could write “As the speed increases so does the distance” or “the slope of the speed vs time graph is 3/4”