Question

kiley gathered the data in the table. she found the approximate line of best fit to be ( y = 1.6x - 4 ). what is the residual value when ( x = 3 )? -1.8 -0.2 0.2 1.8

Explanation:

Step1: Calculate the predicted value \( \hat{y} \)

Substitute \( x = 3 \) into the line of best - fit equation \( y=1.6x - 4 \).

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Step2: Calculate the residual value

The formula for the residual is \( e=y-\hat{y} \). From the table, when \( x = 3 \), \( y=-1 \).

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Answer:

-1.8