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Back to Represent and describe transformations — Problem 3 · Task Set 2

Exercises: Represent and Describe Transformations

Work through each section in order. Show your reasoning where indicated.

Grade 9·21 problems·~30 min·Common Core Math - HS Geometry·standard·hsg-co-a-2
Work through problems with immediate feedback
A

Fluency Practice

Apply the given coordinate rule to find image coordinates. Show your computation.

Coordinate plane showing triangle PQR and its reflection over the y-axis. The y-axis is the line of reflection.
1.

Triangle PQRPQR has vertices P(2,3)P(2, 3), Q(5,3)Q(5, 3), R(4,6)R(4, 6). It is reflected over the yy-axis using the rule M(x,y)=(−x,y)M(x, y) = (-x, y).

What is the xx-coordinate of P′P', the image of P(2,3)P(2, 3) after reflection over the yy-axis?