# Sample quiz on function evaluation Main home here.

1. If $y=f(x)$, what does $f(3)$ mean?
the value of $x$ when $y=3$
the value of $3x$ when $y=3$
the value of $y$ when $x=3$
the value of $3y$ when $x=3$
2. Evaluate $f(2)$, given that $f(x)=x^2-2x$
$0$
$2$
$4$
$-2$
3. Evaluate $f(-1)$, given that $f(x)=\sqrt{-x}$
undefined
$-1$
$0$
$1$
4. Evaluate $f(-1)$, given that $f(x)=\sqrt{x}$.
undefined
$-1$
$0$
$1$
5. Evaluate $f(-2)$, given that $f(x)=\frac{x-2}{x+1}$
$-4$
$-2$
$4$
$2$
6. Given $f(x)=|x-1|$, evaluate $f(-3)$.
$4$
$3$
$-3$
$-4$
7. Given $f(x)=x^2+2x-3$, find the value(s) of $x$ for which $f(x)=0$.
$x=-1$
$x=-1,3$
$x=-3,1$
$x=-3$
8. If $f(0)$ is defined for an arbitrary function $f(x)$, what is its geometrical interpretation?
the maximum value in its graph
the minimum value in its graph
the $x$-intercept(s) of its graph
the $y$-intercept of its graph
9. For which of the following equations is $f(0)$ defined?
$f(x)=\sqrt{x}$
$f(x)=x^2$
$f(x)=|x|$
All of the above
10. Evaluate $f(a)$, given that $f(x)=x^2-ax+a$
$2a^2$
$2a$
$a$
$0$