3/30 U12L4: Line Reflections (y=x & y=-x)

Reflect the point (2, -4) over the y-axis.

• (-4, 2)

• (-2, 4)

• (-2, -4)

• (2, 4)

Reflect (6, -3) over the line x-axis.

• (6, 3)

• (-6, -3)

• (-3, 6)

• (3, -6)

∆QRS contains the points: Q(4, 2) R(5, 1) S(3,7). If the triangle is reflected across the y-axis, what will S' be?

• S'(3, 7)

• S'(-3, 7)

• S'(-3, -7)

• S'(3, 7)

Triangle ABC has vertices A(5,2). Find the coordinates of ABC after a reflection over the x-axis.

• A’(5, -2)

• A’(-5, -2)

• A’(-5, -2)

• A'(5,2)

What is a reflection?

• When you turn an object around a point.
• When you slide an object form one place to another.
• When you flip or mirror an object across a line.
• When you resize an object.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Reflecting over the y-axis changes the ____-_____________.

• x-axis

• x-coordinate

• y-coordinate

• y-axis

Name the transformation.

• Translation
• Reflection
• Rotation

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

(x,y) -------> (-x, -y) is a reflection over the y= x.

• True

• False

C(-6, 2) and B(-1, -1). Reflect over the line y= x

• C' (-6, 2), B' (-1, -1)

• C' (6, 2), B' (1, -1)

• C' (2, -6), B' (-1, -1)

• C' (-6, -2), B' (-1, -1)

What is the mirror line for this reflection?

• y=4

• x=-3

• y=x

• y= -x

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5