B)
What happens when the value of a increases?

Not sure what the question was, but usually when the value of a increases the value of b would correspond based on the negative or positive on whether it increases or decreases.

Step-by-step explanation:

r(0,90)(x,y) . t(-5,0)

last option

step-by-step explanation:

∆def to ∆d"e"f"

- rotate 90 counterclockwise degrees

- then translated 5 to the left (x --> x - 5)

answer is the last option