1. the transformation results in a horizontal shrink.
a. cos (x/5)
b. 9 cos (x)
c. cos (3x)
d. cos (x+2)

2. the transformation results in a vertical stretch.
a. 1/3 cos (x)
b. cos (x+4)
c. cos (-5x)
d. -5 cos (x)

3. the transformation results in a horizontal stretch.
a. 2/7 cos (x)
b. -3 cos (x)
c. cos (7x)
d. cos (x/3)

4. the transformation results in a vertical shrink.
a. cos (x-2)
b. 2/3 cos (x)
c. cos (4x)
d. 2 cos (x)