Question

Which function represents exponential decay?

Answer 1

Answer:

a

Step-by-step explanation:

We are looking for an exponential function $y=a(r)^x$ where r is less than 1.

a works because it is in the form $y=a(r)^x$ where r is less than 1.

b is in the form $y=a(r)^x$ but r is more than 1.

c. and d. are not even exponential functions.

c. is a polynomial

d. is a constant polynomial (no variable)