## Functions Modeling Change: A Preparation for Calculus, 5th Edition

a) $4$ b) $f(3)=0$. c) $2$ d) $f(2)=1$ and $f(4)=1$
a) $f(0)$ is the value of the function at $x=0$, which is $4$, hence $f(0)=4$. b) $f(x)=0$ if the value of the function is $0$ at $x$. According to the table, the value of the function is $0$ at $x=3$, hence $f(3)=0$. c) $f(1)$ is the value of the function at $x=1$, which is $2$, hence $f(1)=2$. d) $f(x)=1$ if the value of the function is $1$ at $x$. According to the table, the value of the function is $1$ at $x=2$ and $x=4$, hence $f(2)=1$ and $f(4)=1$.