which of the following has a rate of change that stays the same

Question

a. y= 4^x ***
b. y= 1/5x^2
c. y= -6x+8
d. y= x^2+3
I think it's a but I'm not sure. Can one of the Jishka teachers check? Thank you!!

Answer 1

The answer is C because the rate of change is always -6.

Answer 2

Thank you!!!

Answer 3

Yes, like y = m x + b :)