Transformations TEST REVIEW

The mathematical term for the line that you reflect a shape over is the...

• Mirror

• Reflective tape

• Line that you reflect over

• Line of reflection

Identify the transformation from ABC to A'B'C'.

• 90^o clockwise rotation
• 90^o counter clockwise rotation
• Reflection across the y-axis
• Reflection across the x-axis

Reflection over the y-axis

• (x,y)-->(-x,-y)

• (x,y)-->(x,-y)

• (x,y)-->(-x,y)

• (x,y)-->(-y,x)

Reflection over the x-axis

• (x,y)-->(-x,-y)

• (x,y)-->(x,-y)

• (x,y)-->(-x,y)

• (x,y)-->(-y,x)

Translation right and up

• (x,y)-->(x+n, y+n)

• (x,y)-->(x-n, y-n)

• (x,y)-->(x+n, y-n)

• (x,y)-->(x-n, y+n)

What is the algebraic representation for this transformation?

• (x, y)-->(3x, 3y)

• (x, y)-->(1/3x, 1/3y)

• (x, y)-->(x+3, y+3)

• (x, y)-->(x-3, y-3)

What is the algebraic representation for this transformation?

• (x, y)-->(2/3x, 2/3y)

• (x, y)-->(3/2x, 3/2y)

• (x, y)-->(3x, 3y)

• (x, y)-->(2x, 2y)

Which is an example of the algebraic rule for a DILATION?

• (3x, 3y)

• (x+3, y-2)

• (-x, -y)

• (y, -x)

Which transformation does NOT preserve congruence?

• transformation

• reflection

• rotation

• dilation

Which scale factor would preserve congruence in a dilation?

• 0

• 1

• 4

• 0.5