Consider the function $y=0.68\left(1.6\right)^x$y=0.68(1.6)x.

Identify what type of function this is:

Exponential growth

Exponential decay

What is the rate of growth?

Consider the function $y=0.98\left(0.2\right)^x$y=0.98(0.2)x.

The local rodent population, numbering approximately $840$840, is decreasing at a rate of $4%$4% per year.

Justin purchased a piece of sports memorabilia for $£2900$£2900, and it is expected to increase in value by $9%$9% per year.