Answer
a.
$x=0 ,y=9$
$x=1, y=9.25$
$x=5, y= 10.25$
$x=10, y= 11.5$
b.
The employee needs to produce 13 units.
Work Step by Step
a.
$y=0,25\times0+9\lt=\gt y=9$
$y=0,25\times1+9\lt=\gt y=9.25$
$y=0,25\times5+9\lt=\gt y= 10.25$
$y=0,25\times10+9\lt=\gt y= 11.5$
b.
$12.25=0.25x+9 \lt=\gt 3.25=0.25x \lt=\gt x=13$