Recognize Percent Growth or Decay Practice Test

A company tracks the number of active users each month:

Month: 0, 1, 2, 3

Users: 12,000; 13,200; 14,520; 15,972

Does this represent constant percent change, and if so, what is the percent growth rate per month?

A laptop loses value each year due to depreciation. Its value is $1200 after 0 years, $1020 after 1 year, $867 after 2 years, and $736.95 after 3 years.

From the data, what is the percent rate of change per year, and is it growth or decay?