College Algebra

The number of crimes that occurred in a certain city per 1000 people had decreased from 45.6 in 1920 to 45.1 in 1970. Find the average rate of change in the number of crimes per 1000 people that occurred from 1920 to 1970.

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  1. total change: -0.5 crimes
    totals time: 50 years

    -0.5 crimes / 50 years = -0.01 crimes/year

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  2. Thank you so much!

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  3. The number of crimes that occurred in a certain city per 1000 people had decreased from 46.1 in 1920 to 44.9 in 1980. Find the average rate of change in the number of crimes per 1000 people that occurred from 1920 to 1980

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