Question

Zachary purchased a computer for $1,300 on a payment plan. Two months after he purchased the​ computer, his balance was $1,100. Four months after he purchased the​ computer, his balance was $900. What is an equation that models the balance y after x​ months?

Answer 1

Answer:

y = 1300 - 100x

Step-by-step explanation:

Zachary purchased a computer for $1300

The first step is to calculate the purchase he paid after 2 months

= 1,300-1,100

= $200

Then the purchase after 1 month is

= $200/2

= $100 per month

The purchase made after 4 months is

= 1,100-900

= $200

The purchase after a month is

= $200/2

= $100 per month

Therefore the equation that models the balance y after x months is

= initial amount of payment plan - amount per month

y= 1,300 - 100x