Question

Katie wants to buy a motor scooter that costs $518. She has already

saved $188 and will earn $22 each week from babysitting jobs. Write and
solve an equation to see how many weeks it will take Katie to save
enough money to buy the motor scooter.

Answer 1

It will take Katie 15 weeks to save up for her motor scooter.

Explanation:

Step 1: Analyze Data

First, you can recognize that Katie is going to make $22 each week, making that our slope. She has already saved $188, so that is our y-intercept since it is our 'start amount.' And then we are given one more number, $518, which is our y value since it is our 'goal.'

Step 2: Create an equation

`518=188+22x`

Step 3: Solve for x

`518=188+22x\\330=22x\\x=15`

Answer 2

$518-$188 = $330

$330 ÷ $22= 15

It will take Katie 15 weeks to save enough money.