Lesson 49

Math Response

Warm-up

Write the equation that is represented by the set of ordered pairs.

Type answer here

Correct Answer: y=2x+3

Deg^°

Rad

We will identify the rule for rotated points.

​Negative signs mean that you change the sign of the previous point.

Multiple Choice

Triangle ZYR was rotated 270° counterclockwise with the origin as the center of rotation to create a new figure. Which rule describes the transformation that was applied to triangle ZYR to create triangle Z'Y'R'?

• (x,y) -> (x,-y)

• (x,y) -> (y,-x)

• (x,y) -> (-y,-x)

• (x,y) -> (-x,-y)

Multiple Choice

• 90° clockwise (y,−x)

  90° counterclockwise (−y,x)

  180° clockwise or counterclockwise (−x,−y)

  270° clockwise (−y,x)

  270° counterclockwise (y,-x)

• (x,y) -> (-x,-y)

• (x,y) -> (x,y)

• (x,y) -> (y,-x)

• (x,y) -> ((-y,x)

​(1, 7) -> the rules says to change the places of x and y -> (7, 1) -> the rule also says to change the sign of y -> (-7, 1)

Multiple Choice

• 90° clockwise (y,−x)

  90° counterclockwise (−y,x)

  180° clockwise or counterclockwise (−x,−y)

  270° clockwise (−y,x)

  270° counterclockwise (y,-x)

• (3,7)

• (-7,3)

• (7,-3)

• (-3,-7)

Multiple Choice

• 90° clockwise (y,−x)

  90° counterclockwise (−y,x)

  180° clockwise or counterclockwise (−x,−y)

  270° clockwise (−y,x)

  270° counterclockwise (y,-x)

• (5,-4)

• (4,-5)

• (-5,4)

• (-4,5)

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Math.