Answer
See the picture.
Work Step by Step
$ŷ=6-0.3x_1+1.7x_2$
- For $x_1=40$:
$ŷ=6-0.3\times40+1.7x_2=-6+1.7x_2$
- For $x_1=50$:
$ŷ=6-0.3\times50+1.7x_2=-9+1.7x_2$
- For $x_1=60$:
$ŷ=6-0.3\times60+1.7x_2=-12+1.7x_2$
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