Hector is buying carrots and potatoes from the grocery
store. The carrots cost $0.64 per pound, and potatoes
cost $0.50 per pound. He creates a graph that shows
all the combinations of pounds of carrots and pounds
of potatoes that he can buy for $4.00. He graphs
pounds of carrots on the x-axis and pounds of
potatoes on the y-axis. What is the y-intercept of
Hector's graph?
A. 7
B. 6.25
C. 7.125
D. 8