math, please help!

The table lists how poverty level income cutoffs(in dollars) for a family of four have changed over time. Use the midpoint formula to approximate the poverty level cutoff in 1987 to the nearest dollar. the poverty level cutoff in 1987 was _____ dollars. ( round to the nearest dollar as needed. year income (in dollars) 1970 3073 1980 8558 1990 13807 2000 17864 2004 19196

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  1. 1987 is 7/10 of the way from 1980 to 1990

    So, what is 7/10 of the way from 8558 to 13807 ?

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  2. 5249

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  3. The answer is 11134.5, which would be rounded to 11135.

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