Which equation shows a linear relationship between the variables stated?
a. d = 1/2 at2 , for d versus t
b. ek = 1/2 mv2 , for ek versus v
c. m = f/a, for m versus a
d. v = ir, for v versus i

A and B cannot be the answer because they are square equations and not linear. C also is not the answer because you can't make m/a = something

D is the answer because you can divide both sides by I and get equation
V/I=R. Right side is linear therefore that is the answer.