Question

5.) The vertices of a triangle are P(4, 1), Q(2, -8), and R(-8, 1). What are the vertices of the image reflected across the y-axis?
a.) P'(4, -1), Q'(2, 8), and R'(-8, -1)
b.) P'(-4, 1), Q'(-2, -8), and R'(8, -1)
c.) P'(4, -1), Q'(-2, 8), and R'(8, -1)
d.) P'(4, 1), Q'(2, 8), and R'(-8, 1)

Answer 1

The vertices of the image reflected across the y-axis will have the same x-coordinate as the original vertices but the y-coordinate will change sign.

So the correct answer is:
c.) P'(4, -1), Q'(-2, 8), and R'(8, -1)