Answer:
C
Explanation:
A proportional relationship exists where the outputs and inputs have a constant of proportionality. This is a ratio of y/x that is the same between all x and y values in a table.
a. x: 0,1,2 y:2,5,8
2/0 = 0, 5/1 = 5 not proportional
b. x: 0,1,2 y:0,1,4
1/1 = 1, 4/2 = 2 not proportional
c. x: 0,1,2 y:0,3,6
3/1 = 3, 6/2 = 3 YES proportional
d. x 0,1,2 y:2,3,7
2/1 = 2, 3/2 = 1.5 not proportional