Big Ideas Math Integrated I, 2016
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Big Ideas Math Integrated I, 2016 View details
2. Reflections
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Exercise 8 Page 556

Two points reflected in the y-axis have opposite x-coordinates.

Practice makes perfect

We are given three vertices of â–³ JKL. To graph the triangle, let's plot the points and then connect them.

To find the images of the points reflected in the y-axis, we can use the coordinate rule. Two points reflected in the y-axis have opposite x-coordinates.

(a,b) (- a, b)
J(5,3) J'( -5,3)
K(1,-2) K'( -1,-2)
L(-3,4) L'( 3,4)

Now we can graph the image of â–³ JKL after a reflection in the y-axis.