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In a particular classroom, a student who did not study scored 60 points on a test. If that student scored 90 points when studying for three hours, what is the rate of change of his score per hour studied?
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In a particular classroom, a student who did not study scored 60 points on a test. If that student scored 90 points when studying for three hours, what is the rate of change of his score per hour studied?

User Josh Petitt
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30 points over 3 hours equals: 10 points/hr
User Roray
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