91Ó°ÊÓ

Determine whether the graph is that of a function by using the vertical-line test. If it is, use the graph to find: (a) The domain and range (b) The intercepts, if any (c) Any symmetry with respect to the x-axis, the y-axis, or the origin.

Determine whether each relation represents a function. For each function, state the domain and range.

In Problems 7–18, match each graph to one of the following functions:

$$\begin{gathered} \mathit{A}\mathbf{.}y=x^2+2\mathit{B}\mathbf{.}y=-x^2+2\mathit{C}.y=\left|x\right|+2 \\ \mathit{D}\mathbf{.}y=-\left|x\right|+2\mathit{E}\mathbf{.}y={(x-2)}^2\mathit{F}\mathbf{.}y=-{(x+2)}^2 \\ \mathit{G}\mathbf{.}y=\left|x-2\right|\mathit{H}\mathbf{.}y=-\left|x+2\right|\mathit{I}\mathbf{.}y=2x^2 \\ \mathit{J}\mathbf{.}y=-2x^2\mathit{K}\mathbf{.}y=2\left|x\right|\mathit{L}\mathbf{.}y=-2\left|x\right| \end{gathered}$$

An equilateral triangle is inscribed in a circle

of radius r. See the figure in Problem 16. Express the area A within the circle, but outside the triangle, as a function of the length x of a side of the triangle.

Graph each function.

$f\left(x\right)={\left(x+2\right)}^2-3$

Use the graph of the function fshown to find:

(a) The domain and the range of f

(b) The intervals on which f is increasing,decreasing,or constant.

(c) The local minimum values and locak maximum values.

(d) The absolute maximum and absolute minimum

(e) Wheather the graph is symmetric with respect to the x-axis,y-axis,or the origin.

(f) Whether the function is even,odd or neither.

(g) The intercepts, if any.

Determine whether the graph is that of a function by using the vertical-line test. If it is, use the graph to find: (a) The domain and range (b) The intercepts, if any (c) Any symmetry with respect to the x-axis, the y-axis, or the origin.

In Problems 11–20, use the graph of the function f given.

Is there a local maximum value at 2? If yes, what is it?

In Problems 7–18, match each graph to one of the following functions:

$$\begin{gathered} \mathit{A}\mathbf{.}y=x^2+2\mathit{B}\mathbf{.}y=-x^2+2\mathit{C}.y=\left|x\right|+2 \\ \mathit{D}\mathbf{.}y=-\left|x\right|+2\mathit{E}\mathbf{.}y={(x-2)}^2\mathit{F}\mathbf{.}y=-{(x+2)}^2 \\ \mathit{G}\mathbf{.}y=\left|x-2\right|\mathit{H}\mathbf{.}y=-\left|x+2\right|\mathit{I}\mathbf{.}y=2x^2 \\ \mathit{J}\mathbf{.}y=-2x^2\mathit{K}\mathbf{.}y=2\left|x\right|\mathit{L}\mathbf{.}y=-2\left|x\right| \end{gathered}$$

Determine whether each relation represents a function. For each function, state the domain and range.