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

Chapter Review

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Exercise 15 Page 92

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

Over the x-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 (2,1) and its image (2,- 1) are located on opposite sides of the x-axis. Also, their x-coordinates are the same, and their y-coordinates are opposite numbers. With this information we can conclude that the reflection is done over the x-axis.