Question

determine whether each function is an example of exponential growth or decay. then find the y-intercept
1. y=100(0.25)^x
2. y=7/8(18)^x

Answer 1

the multiplier tells you whether it is growth or decay.
y = a(b)^x b is the multiplier

if the multiplier is bigger than 1 it is growth
if the multiplier is between 0 and 1 it is decay