We know that pi equals approximately 3.14 and the radius of the circle is 8 feet. That is all we'll need to find the area and circumference of the circle.
It would be this equation because you start at 5, which is the y-intercept, then you add 0.75 for every pound of apples. So on a graph you would start at 5 on the y-line then go up by 0.75