Question

Mr. Thomas purchased a car for $30,000. in 4 years the value of the car decreased to $22,000. Which integer represents the average net change in value per year?

Answer 1

The change in value over 4 years is
  $22,000 - 30,000 = -$8,000

so the average change in value per year is
  -8000/4 = -2000