Question

Triangle XYZ is rotated 90° counterclockwise about the origin.

What are the coordinates of point Y’?
(4, –2)
(1, 4)
(–4, 1)
(–1, –4)

Answer 1

Answer:

$Y'(1,4)$

Step-by-step explanation:

From the diagram, the vertex Y of the triangle has coordinates (4,-1).

The mapping for 90° counterclockwise rotation about the origin is

$(x,y)\to (-y,x)$

This implies that;

$Y(4,-1)\to Y'(--1,4)$

$\Rightarrow Y(4,-1)\to Y'(1,4)$

The correct answer is B.

Answer 2

Answer:

1,4

Step-by-step explanation: