A triangle with vertices A(2, -2), B(-1, -1) and C(0, 2) is reflected across the y-axis and then dilated by a factor of 3 with the origin as the center of dilation. What is the x-coordinate of the A'?

Question

A: -4

B: -6

C: -2

D: 2

Answer 1

Take it step by step, with a focus on the answer. The answer asks for the coordinate of A'.

A: (2,-2)

reflected across the Y-axis, the x coordinate switches sign, and the y coordinate is unchanged.

A is now (-2,-2).

Dilated by a factor of 3 from the origin is going to triple all the coordinates.

A is now (-6,-6)

Take the x coordinate

-6