Question

Which of the following rules best describes the matrix below?

a. rotation of 90 counterclockwise about the origin c.
b. reflection over the line y = x
C. rotation of 180° about the origin
D. translation 1 unit left and 1 unit up

Answer 1

I think its a

Explanation:

because if you draw a graph and plot the points (0,-1) and (1,0) then you can check if they make a 90 degree angle turn counterclockwise.

Sorry if its not much information,Its hard to explain.