Babysitting Formula

Liz earned d dollars for h hours of babysitting. At that rate, how much will she earn in x hours? Write a formula that works. Then use numbers to check it: Make up a reasonable hourly rate for babysitting, assume she sits for 3 hours (that’s h), and get her total (that’s d). Now figure out what she’d get for 5 hours (that’s x) and see if your formula works.

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Liz earned d dollars for h hours. Thus, her hourly rate is d/h.

In x hours she will earn xd/h dollars.

If she earned $28.50 for 3 hours, 28.5/3 = $9.50 per hour.

So tonight she’ll earn 5 x 9.50 = $47.50.

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