Question

Zachary purchased a computer for ​$1100 on a payment plan. three months after he purchased the​ computer, his balance was ​$710. four months after he purchased the​ computer, his balance was ​$580. What is an equation that models the balance y after x​ months?

Answer 1

y = 1,100 - 130x

Explanation:

Zachary purchased a computer for ​$1100 on a payment plan. three months after he purchased the​ computer, his balance was ​$710. four months after he purchased the​ computer, his balance was ​$580. What is an equation that models the balance y after x​ months?

(1,100 - 710)/3 = he pays $130 per month

(1,100 - 580)/4 = he pays $130 per month

when balance = y and x = months

y = 1,100 - 130x