Unit 4 Credit Recovery Test

Front

What is a reflection in geometry?

Back

A reflection is a transformation that flips a figure over a line, creating a mirror image.

Front

How do you reflect a point over the x-axis?

Back

To reflect a point (x, y) over the x-axis, the new coordinates become (x, -y).

Front

What is the transformation rule for translating a point?

Back

The transformation rule for translating a point (x, y) by (a, b) is (x+a, y+b).

Front

What does a scale factor represent in transformations?

Back

A scale factor indicates how much a figure is enlarged or reduced during a transformation.

Front

How do you find the scale factor when comparing two similar figures?

Back

The scale factor is found by dividing the length of a side of the larger figure by the corresponding side of the smaller figure.

Front

What is the result of reflecting the point E(0, 2) across the line y = x?

Back

The coordinates of E' after reflection across y = x are (2, 0).

Front

What is the difference between enlargement and reduction in transformations?

Back

Enlargement increases the size of a figure (scale factor > 1), while reduction decreases the size (scale factor < 1).

Front

If a point (x, y) is transformed to (2x, 2y), what is the scale factor?

Back

The scale factor is k=2.

Front

What are the coordinates of the reflection of point X(9, -2) over the x-axis?

Back

The reflection of point X(9, -2) over the x-axis is (9, 2).

Front

What does the notation (x+8, y+4) represent in transformations?

Back

It represents a translation of a point 8 units to the right and 4 units up.