The table below gives the number of hours spent unsupervised each day as wd as t

Question

The table below gives the number of hours spent unsupervised each day as wd as the overall grade averages for seven randomly selected middle school students. Using this data, consider the equation of the regression line for predicting the overall grade average for a middle school student based on the number of hours spent unsupervised each day. According to the estimated model y = 97.057 - 6.791x, if the value of the independent variable by one unit, then find the change in the dependent variable y.

Explanation / Answer

Since slope is -6.791 so for each unit increase in independent variable, valueof dependent variable decrease by 6.791 units.

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