1.	Which matrix can be used to reflect a figure in the y-axis?
		A.		B.
		C.		D.
		Hint
	2.	To rotate a figure 90° counterclockwise about the origin, use the matrix _____ .
		A.		B.
		C.		D.
		Hint
	3.	The vertex matrix of a triangle is . Find the vertex matrix of its image after a reflection in the origin.
		A.		B.
		C.		D.
		Hint
	4.	For a reflection in the x-axis, multiply the vertex matrix on the left by _____ .
		A.		B.
		C.		D.
		Hint
	5.	For a 270° counterclockwise about the origin, multiply the vertex matrix on the left by _____ .
		A.		B.
		C.		D.
		Hint