For which function does the output increase by 20% every time the input increases by 1?

Answer 1

x=1, y=1 (1,1)

x=2, y=1.2 (2,1.2)

x=3 y=1.44 (3,1.44)

x=4 y=1.2^3 (4, 1.2^3)

fit a curve through those 4 points

as x increases 1, y increases 20%

it's an exponential function

(x,1.2^(x-1)) is a point on the curve for any x

f(x)= 1.2^(x-1)