Last week, Hazel paid $32 to have 50 reports printed. This week, she paid $57 to have 100 reports printed. Assume the relationship is linear. Which equation models the relationship between the the numbers of the numbers of reports, x, and the cost y?
a. y=2x+68
b. y=1/2x+7
c. y=1/2x+34
d. y=2x+34