Which graph below shows the rule: output = 4 times input?

(I am unable to put graphs in.)

Write a rule for the function represented by the table
0, 13
1, 28
2, 43
3, 58

A. y = 15 + 13x
B. y = 14 + 12x
C. y = 13 + 15x**
D. y = 12 + 14x

Select a graph for the situation. On a trip, the gas mileage remains constant when traveling between 10 and 20 miles per hour, increases until speeds reach 50 mph, and then decreases as the speed increases.

(Once again, I cannot show the graphs.)

2 answers

C. y = 13 + 15x**
Yes
Uh. What about the actual multiple-choice answer?
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