1. The vertices of a triangle are P(2,-4), Q(-5,3), and R(-1,-2). What are the vertices of the image reflected across the y-axis?

A) P(2,-4), Q(-5,3), R(-1,-2)
B) P(2,4), Q(-5,-3), R(-1,2)
C) P(-2,-4), Q(5,3), R(1,-2)
D) P(-2,4), Q(5,-3), R(1,2)

Could someone please help me with this? I'm completely lost.

4 answers

a reflection in the y-axis leaves the y's along but changes the x's to their opposites

so P(2,-4) ---> P' (-2 , -4)

repeat for the other points, then choose your answer

Would the answer be C?

Also, thank you so much!

P'(-2,-4) Q'(5,3) R'(1,-2)