Answer
$ŷ =128.06$
Work Step by Step
$ŷ =200.0−1.624x_1$
If $x_1=44.3$, $x_2=1.1$, $x_3=7$, and $x_4=69$:
$ŷ =200.0−1.624\times44.3=128.06$
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