Reflections

Front

What is a reflection?

Back

When you flip or mirror an object across a line.

Front

If the point S(3, 7) is reflected across the y-axis, what will S' be?

Back

S'(-3, 7)

Front

What is the Mapping Notation for a reflection across the x-axis?

Back

(x, y) → (x, -y)

Front

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

Back

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

Front

What is the result of reflecting the point A(2, 3) across the x-axis?

Back

A'(2, -3)

Front

If the triangle ∆ABC has vertices A(1, 2), B(3, 4), C(5, 6), what are the coordinates of A' after reflection across the y-axis?

Back

A'(-1, 2)

Front

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

Back

The y-coordinates of all points in the shape are multiplied by -1.

Front

If a point P(-4, 5) is reflected across the origin, what are the new coordinates?

Back

P'(4, -5)

Front

What is the reflection of the point (x, y) across the line y = x?

Back

(y, x)

Front

How do you determine the image of a point after reflection across the y-axis?

Back

Change the sign of the x-coordinate.