Exercise 7 Page 137

Reflected points are the same distance from but on opposite sides of the line of reflection before and after the reflection takes place.

Let's start by plotting the given points and connecting them to draw our triangle.

We want to reflect this figure over the y-axis. To do so, we need to plot each vertex of the image X'Y'Z' the same distance from the line of reflection as its corresponding vertex on the preimage XYZ. Because our line of reflection is the y-axis, this will change the sign of the x-coordinates of the points, but the y-coordinates will remain unchanged.

Preimage XYZ		Image X'Y'Z'
Vertex	Distance From the y-axis	Vertex	Distance From the y-axis
X(-6,-1)	6 unit left the y-axis	X'(6,- 1)	6 unit right the y-axis
Y(-3,-5)	3 units left the y-axis	Y'(3,-5)	3 units right the y-axis
Z(-2,-3)	2 units left the y-axis	Z'(2,-3)	2 units right the y-axis

Let's do the reflection!

Therefore, the correct option is B

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Exercise 7 Page 137

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