which function has the least rate of change?

function A

x y
5 4.95
10 9.90
15 14.85
20 19.80
25 24.75

function b
x 4 8 12 16 20
y 2 18.4 34.8 51.2 67.6

a. function a
b. function b
c. their rates of change are the same

The function with the least rate of change is function A.

Function A has a rate of change of 0.1, while function B has a rate of change of 3.7. Therefore, function A has the least rate of change.