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 per item
B.
the number of items purchased
C.
the discount received by a customer who did not make a purchase
D.
the amount spent by a customer who did not receive a discount
D. the amount spent by a customer who did not receive a discount. is your best answer choice.
Step-by-step explanation:
x stands for the "discount received" (shown in table)
y stands for "amount spent (in dollars)" (shown in table)
In the equation:
y = mx + b
y = (x , y)
m = slope
x = (x , y)
b = y-intercept
~
In this case, the y-intercept stands for the amount spent ($7.50) when the discount received is 0%. When the customer does not receive any discount (nor do they spend any extra money), they must pay a flat fee of $7.50.
