Big Ideas Math Integrated I, 2016
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Big Ideas Math Integrated I, 2016 View details
1. Translations
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Exercise 23 Page 549

Find how many units were moved horizontally and vertically between each image and preimage.

First Translation: (x,y)→(x+5,y+1)
Second Translation: (x,y)→(x-5,y-5)

Practice makes perfect

In this exercise, two translations have been performed. We will start by writing the transformation from the preimage â–³ ABC to the image â–³ A'B'C'.

Translation from â–³ ABC to â–³ A'B'C'

We can see in the given graph that â–³ A'B'C' is a translation up 1 unit, and right 5 of â–³ ABC.

Vertical translations affect the y-coordinate and horizontal translations affect the x-coordinate. We can use this to write the translation from △ ABC to the image △ A'B'C'. (x,y)→(x + 5,y + 1)

Translation from â–³ A'B'C' to â–³ A''B''C''

From the given graph we see that â–³ A''B''C'' is a translation down 5 units, and left 5 units of the graph of â–³ A'B'C'.

Again, keep in mind that vertical translations affect the y-coordinate and horizontal translations affect the x-coordinate. Let's write the translation from △ A'B'C' to the image △ A''B''C''. (x,y)→(x - 5,y - 5)