Question

Point A is the original point before rotating. Which point represents A′ after A(4, 1) is rotated 90° counterclockwise: B, C, D, E, F, G, or H?

Answer 1

Point G

Explanation:

The mapping rule for a 90° counterclockwise rotation is:

• (x, y) → (-y, x)

Therefore, if A = (4, 1):

• A' = (-1, 4)

The point that represents A' after A(4, 1) is rotated 90° counterclockwise is:

• Point G