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An experiment is conducted to enhance a child’s ability to reason deductively. Each child is tested...

An experiment is conducted to enhance a child’s ability to reason deductively. Each child is tested before and after the experiment. The increase in “ for a child in test scores and the age “x” for a child are modeled by this equation.

                                           Y=15.65+7.5x

If two sisters in age differ by four years, by how much are their scores on this test expected to differ? please show work

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