If we notice, the decrease in payment after 3 and 5 months, it is a multiple of 150.
So, the equation that models balance b after m months is:
b = 1800 - 150m
Here, - 150 is the slope and it indicates the amount being decreased every month.
Answer:
balance (b) = 1800 - 150m, where "m" is the number of months.
Step-by-step explanation:
Zachary purchased a computer for 1800 on a payment plan.
After 3 months, his balance = 1350
Reduced amount = 1800 - 1350 = 450
So, 1 month payment = 450 ÷ 3 = 150
After 5 months, his balance = 1050
The reduced amount = 1800 - 1050 = 750
So, 1 month payment = 750 ÷ 5 = 150
Therefore, the rate of change = -150. It is negative because the amount getting reduced.
Therefore, the model is
balance (b) = 1800 - 150m, where "m" is the number of months.
