Reflections and Dilations

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

• x-axis

• x-coordinate

• y-coordinate

• none of the above

Reflections over the x-axis change the ____-__________. 

• y-coordinate

• x-coordinate

• y-axis

• x-axis 

Find K' if the figure is reflected across the x-axis

• (4, 1))

• (-1, -4)

• (1, -4)

• (1, 4)

If the trapezoid is reflected across the x-axis, what is the coordinates of R'?

• (-8,-7)

• (-8,7)

• (8,7)

• (8,-7)

Which rule describes the action of the coordinates when a figure is dilated by a scale factor of 2?

• (x, y)→(x+2, y+2)

• (x, y)→(2x, 2y)

• (x, y)→(x/2, y/2)

• (x, y)→(x-2, y-2)

A transformation in which a geometric figure is reflected across a line, creating a mirror image. 

• Translation

• Reflection

• Rotation

• Dilation

Is this an enlargement or a reduction?

• Enlargement

• Reduction

Is the picture being reflected in the y-axis or x-axis?

• y-axis

• x-axis

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

• (6, 3)

• (-6, -3)

• (-3, 6)

• (3, -6)

∆BCD contains the points: B(2,3) C(2,1) D(5,1). If the triangle is reflected across the x-axis, what will B' be?

• B'(2, -3)

• B'(-2, 3)

• B'(-2, -3)

• B'(2, 3)