1 Answer

CherylG · Answer 1 · 2019-09-14T09:28:03+0000

Usually the best fit line is written with a hat:

$\hat{y} = 3.8 x + 15.61$

At x=11.9 we see in the table an observed score of 70.00 First Row, First Box

At x=11.9 we predict 3.8(11.9)+15.61 = 60.83 First Row, Second Box

The residual is
$y - \hat{y} = 70.00 - 60.83 = 9.17 \quad$ First Row, Third box

At x=15.1 we see in the table y=65.00 Second Row, First Box

At x=15.1 we predict 3.8(15.1)+15.61 = 72.99 Second Row, Second Box

Residual, difference, 65 - 72.99 = -7.99 Second Row, Third Box

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