Which of the following describes the rigid transformation in the function shown below?
y+5=-2(x-1)^2

a. The graph is stretched vertically by a factor of 2
b. The graph is reflected across the y-axis
c. The graph is shifted 5 units down
d. The graph is shifted 1 unit left

Question

Which of the following describes the rigid transformation in the function shown below? 
 y+5=-2(x-1)^2 

a. The graph is stretched vertically by a factor of 2
b. The graph is reflected across the y-axis 
c. The graph is shifted 5 units down 
d. The graph is shifted 1 unit left

anonymous · Answer

The answer is C. 

Transformation a is not a rigid transformation since it changes the shape by stretching.

Transformation b, there is no reflection across the y axis. Multiplying by -2 reflects across the x axis.

Transformation d, the graph is shifted to the right one unit and not to the left.