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Q. 7

Expert-verified
Found in: Page 112

### Precalculus Enhanced with Graphing Utilities

Book edition 6th
Author(s) Sullivan
Pages 1200 pages
ISBN 9780321795465

# In Problems 7–18, match each graph to one of the following functions:$\mathbit{A}\mathbf{.}y={x}^{2}+2\phantom{\rule{0ex}{0ex}}\mathbit{B}\mathbf{.}y=-{x}^{2}+2\phantom{\rule{0ex}{0ex}}\mathbit{C}.y=\left|x\right|+2\phantom{\rule{0ex}{0ex}}\mathbit{D}\mathbf{.}y=-\left|x\right|+2\phantom{\rule{0ex}{0ex}}\mathbit{E}\mathbf{.}y={\left(x-2\right)}^{2}\phantom{\rule{0ex}{0ex}}\mathbit{F}\mathbf{.}y=-{\left(x+2\right)}^{2}\phantom{\rule{0ex}{0ex}}\mathbit{G}\mathbf{.}y=\left|x-2\right|\phantom{\rule{0ex}{0ex}}\mathbit{H}\mathbf{.}y=-\left|x+2\right|\phantom{\rule{0ex}{0ex}}\mathbit{I}\mathbf{.}y=2{x}^{2}\phantom{\rule{0ex}{0ex}}\mathbit{J}\mathbf{.}y=-2{x}^{2}\phantom{\rule{0ex}{0ex}}\mathbit{K}\mathbf{.}y=2\left|x\right|\phantom{\rule{0ex}{0ex}}\mathbit{L}\mathbf{.}y=-2\left|x\right|$

The given graph is matched to the function $\mathbit{B}\mathbf{.}\mathbf{}y=-{x}^{2}+2.$

See the step by step solution

## Step 1. Given Information

There is the given graph we have to match each graph to its functions.

## Step 2. Identifying the function of the graph

When the right side of the function $y=f\left(x\right)$ is multiplied by $-1,$ the graph

of the new function $y=-f\left(x\right)$ is the reflection about the x-axis of the graph

of the function $y=f\left(x\right)$.

Thus, the function whose graph is the reflection of the graph of $y={x}^{2}$ in the x-axis is $y=-{x}^{2}$.

The given graph is the reflection in the x-axis of the function $y={x}^{2}$ that is shifted vertically up by $2$ units.

So, the function of the given graph is role="math" localid="1645856662806" $y=-{x}^{2}+2$ that matched to option B.

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