Review Transformations

Which rule represents a reflection

• -x,-y

• 4x, 6y

• (x+6, y-7)

• (x,-y)

A square with a perimeter of 20 units is graphed on a coordinate grid. The square is dilated by a scale factor of 0.4 with the origin as the center of dilation.

If (x, y) represents the location of any point on the original square, which ordered pair represents the coordinates of the corresponding point on the resulting square?

• (20x, 20y)

• (x + 20, y + 20)

• (0.4x, 0.4y)

• (x + 0.4, y + 0.4)

 A polygon will be dilated on a coordinate grid to create a smaller polygon. The polygon is dilated using the origin as the center of dilation.

Which rule could represent this dilation?

• (x, y) 🡪 (0.5 – x, 0.5 – y)

• (x, y) 🡪 (x – 7, y – 7)

• (x, y) 🡪 (54 x, 54 y)

• (x, y) 🡪 (0.9x, 0.9y)

Which transformation does not preserve congruence?

 The coordinates of the vertices of a quadrilateral are P(1, 2), R(1, 4), S(3, 4) and T(4, 2).

Quadrilateral PRST is reflected across the y-axis to create quadrilateral P’R’S’T’. Which rule describes this transformation?

• (x, y) 🡪 (x, –y)

• (x, y) 🡪 (–x, y)

• (x, y) 🡪 (y, –x)

• (x, y) 🡪 (–y, x)

Which rule is a rotation?

• (-x,-y)

• (-x,y)

• (x,-y)

• (y,-x)

Which rule represents the transformation in the graph?

• (x, y) 🡪 (x, –y)

• (x, y) 🡪 (x – 7, y)

• (x, y) 🡪 (x, y – 7)

• (x, y) 🡪 (–x, y)

Quadrilateral PQRS was translated 6 units to the right and 2 units up to create     Quadrilateral P’Q’R’S′. Which rule describes this transformation?

• (x, y) 🡪 (x –6, y – 2)

• (x, y) 🡪 (x – 2, y – 6)

• (x, y) 🡪 (x + 2, y + 6)

• (x, y) 🡪 (x + 6, y + 2)

 Pentagon VWXYZ is shown on the coordinate grid. A student reflected Pentagon VWXYZ across the x-axis to create Pentagon V’W’X’Y’Z’.

Which rule describes this transformation?

• (x, y) 🡪 (–y, x)

• (x, y) 🡪 (x, y + 8)

• (x, y) 🡪 (x, –y)

• (x, y) 🡪 (–x, y)

Which proportion is true?