Answer:
A is exponential, B is exponential, and C is linear.
Step-by-step explanation:
If you would like to test, you can find the ratio from x to y, for example A
x = 1, y = 2
1/2=.5
x = 2, y = 4
2/4=.4
x = 3, y = 8
3/8 = .375 - so this one doesn't work
etc
