Answer
a) $f(-2)=3$
$f(1)=0$
b) See graph
Work Step by Step
To find $f(-2)$ one first must check what equation to use depending on the condition. Since $-2\leq1$, the first condition is used. Thus:
$f(-2)=1-(-2)=3$
To find $f(1)$ one first must check what equation to use depending on the condition. Since $1\leq1$, the first condition is used. Thus:
$f(1)=1-1=0$
