To find:the vertices of image of a square with the given vertices after the given transformation by using matrices. Then sketch the square and its image.

Answer to Problem 17E
The vertices of the image are (-4,3),(-5,3),(-4,4),(-5,4).
Explanation of Solution
Given information: The given vertices are (4,3),(5,3),(4,4),(5,4) and reflection in the y-
axis.
Calculation:
A square hasvertices at (1,2),(3,2),(1,4),(3,4). To find the image of the square after a
reflection in the y- axis, first write the vertices as column matrices . Then multiply each
column matrix by the reflection in the y- axis transformation matrices .
The reflection in the y- axis transformation matrices is,
So, the vertices of the image are (-4,3),(-5,3),(-4,4),(-5,4).
Blow figure shows the square and its image.
Chapter 7 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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