The graph below shows a line of best fit for data collected on the amount customers spent in relation to the discount they received.
The equation of the line of best fit is y = 25x + 7.5. What does the y-intercept represent?
A.
the discount received by a customer who did not make a purchase
B.
the discount per item
C.
the amount spent by a customer who did not receive a discount
D.
the number of items purchased