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OpenStudy (anonymous):
Farley bought $5 worth of school supplies plus pencils at $0.40 per pencil. What is the rate of change in this sentence?
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OpenStudy (agreene):
A rate of change is something with "per" usually. like mph or miles PER hour, m/s or meters PER second. It refers to the division, which gives you a rate. so in this sentence you have have "$0.40 PER pencil" or $0.40/1pencil so that's your rate of change.
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