Question

chris works at a pet store after school he helps stock shelves and feed animals chris already had $18 saved from a previous job a total amount of money he has saved can be modeled by the equation
y=12x+18
where x represents the number of hours chris works at the pet store and y represents his total money saved

Answer 1

This linear equation models Chris’s total savings:
y = 12x + 18

Interpretation
- Slope 12: Chris earns $12 per hour at the pet store (each additional hour adds $12).
- Y-intercept 18: Chris already has $18 saved before working any hours (when x = 0).

Quick examples
- If he works 0 hours: y = 12(0) + 18 = $18.
- If he works 5 hours: y = 12(5) + 18 = $78.

Solve for hours needed for a target amount
Rearrange to find x for a desired total y:
x = (y − 18) / 12

Example: to have $100,
x = (100 − 18) / 12 = 82 / 12 ≈ 6.83 hours → so he needs 7 hours if he must work whole hours.

Would you like me to calculate y for a specific number of hours or find how many hours for a particular savings goal?