Question

5.
a. $f(-1) =$
b. $f(2) =$
c. $f(1) =$
d. $f(-2) =$
e. $f(0) =$

Explanation:

Step1: Locate x=-1 on graph

Find the solid dot at $x=-1$, its y-value is $-1$.

Step2: Locate x=2 on graph

Find the horizontal segment at $x=2$, its y-value is $1$.

Step3: Locate x=1 on graph

Find the solid dot at $x=1$, its y-value is $1$.

Step4: Locate x=-2 on graph

Find the solid dot at $x=-2$, its y-value is $0$.

Step5: Locate x=0 on graph

Find the line at $x=0$, its y-value is $1$.

Answer:

a. $-1$
b. $1$
c. $1$
d. $0$
e. $1$