Question

Triangle ABC has vertices A(1,4), B(-1,5), and C(1,-4). Triangle ABC is dilated and

B' is located at (-3,15). What is the y-coordinate of C'?

Answer 1

-12

Explanation:

The coordinates of B' are just 3 times the coordinates of B, so the multiplier in the dilation is 3.

C' is the point with coordinates 3 times the coordinates of C, making C'(3, -12).

The y-coordinate is -12.