Respuesta :
The domain tells you about the independent variable, number of payments made. So the inequality should be
smallest number of payments made ≤ variable representing payments ≤ largest number of payments made.
The smallest number of payments is 0 and the largest is 8, so you'll have
0≤variable≤8
0≤variable≤8
The answer is {0 ≤ x ≤ 8} I took a test with this question and got it right.