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Big Ideas Math: Modeling Real Life, Grade 8 View details

Chapter Review

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Exercise 14 Page 92

Plot both points on a coordinate plane. What coordinates are the same? What coordinates are opposite?

Over the y-axis

Practice makes perfect

We are given the coordinates of a point and its image after a reflection. Let's plot them on a coordinate plane!

We can see that the point (- 1,- 3) and its image (1,- 3) are located on opposite sides of the y-axis. Also, their y-coordinates are the same, and their x-coordinates are opposite numbers. With this information we can conclude that the reflection is done over the y-axis.