Reflections

Front

What is a reflection?

Back

A reflection is when you flip or mirror an object across a line.

Front

What axis is the image reflected over when reflecting across the y-axis?

Back

Y-axis

Front

What is the rule for reflecting a point across the x-axis?

Back

(x, y) → (x, -y)

Front

Reflect the point (2, -4) over the y-axis. What is the new point?

Back

(-2, -4)

Front

What shape is the reflection from shape E in the x-axis?

Back

B

Front

What happens to the coordinates of a point when it is reflected over the y-axis?

Back

The x-coordinate changes sign, while the y-coordinate remains the same.

Front

If a point (a, b) is reflected over the x-axis, what are the new coordinates?

Back

(a, -b)

Front

What is the effect of reflecting a shape over the x-axis?

Back

The shape appears flipped vertically.

Front

What is the effect of reflecting a shape over the y-axis?

Back

The shape appears flipped horizontally.

Front

How do you reflect a point (x, y) over the line y = x?

Back

The new coordinates are (y, x).