Need help figuring out exponential decay. Which of the following exponential functions represent exponential decay? Select all that apply.

Question

Which of the following exponential functions represent exponential decay? Select all that apply.

a)y=(1.01)^x

b)y=(0.95)^(2x)

c) y=1.8(0.6)^x

d) y=(0.85)^x

e) y=0.25(1.5)^(3x)

Answer 1

b, c , d are all decreasing exponential functions although exponential decay is usually expressed using the exponential function e^-kx.