Question

If ΔABC has vertices A (3, –1), B (2, 1), and C (5, 3), find vertices of its image ΔA′B′C′ after dilation with a scale factor of 2 about the origin. answers: A) A′ (3∕2, 1∕2), B′ (1, 1∕2), C′ (5∕2, 3∕5) B) A′ (6, –2), B′ (4, 2), C′ (10, 6) C) A′ (6, 2), B′ (2, 2), C′ (10, 6) D) A′ (6, 2), B′ (4, 2), C′ (10, 6)

Answer 1

B

Explanation:

Answer 2

A' (6, -2)

B' (4, 2)

C' (10, 6)

Explanation:

When you dilate by a scale factor of 2 about the origin, multiply each coordinate point by 2.

(3, -1) × 2 = (6, -2)

(2, 1) × 2 = (4, 2)

(5, 3) × 2 = (10, 6)