Question

Zoe has $545 saved in the bank. She earns $80 per week working after school. Which function can be used to find y, the amount of money Zoe will have saved at the end of x weeks?

A. y= -80x + 545
B. y= 45x + 545
C. y= 80x + 545
D. y= 545x + 80

Answer 1

Option: D. y= 545x + 80

Explanation:

Linear Modeling

The initial amount in the bank is $545. Each week an amount of $80 is earned. In x weeks, Zoe will have earned 80x.

Thus, the total savings in x weeks are:

y = 545 + 80x

Option: D. y= 545x + 80