C - The relationship represents a function because each input gives one unique output.
Step-by-step explanation:
To see if it is a function we can do the line test where we have a vertical line and "drag" it along the line. As long as it only hits the line once in every situation it is a function! We can see this passes and therefore the answer is c.
(why is it not d? you can have a non-linear line, but still have a function)
First you get both distances 9.3 x 107 = 995.1 miles 8.87 x 108 = 957.96 miles then you subtract them both 995.1 - 957.96 = 37.14 miles and 37.14 miles is the distance between Earth and Saturn.
