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

–1.8

Step-by-step explanation:

A residual is the distance between an observed (actual) point and a predicted value.  To make the prediction, we substitute 3 in for x in our line of best fit:

y = 1.6(3) - 4 = 4.8 - 4 = 0.8

To find the residual, we subtract the actual value and the predicted value:

-1-0.8 = -1.8

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