Answer:

Step-by-step explanation:

Answer:
k=1/3; k=-2/5
Step-by-step explanation:

Answer:
it is b
Step-by-step explanation:
The mapping rule for 90 degrees counterclockwise would be (-y,x). So if you had (x,y) it would transfer to (-y,x). Yours is wrong it should be (4,-3). Remember
-(-4) is 4 and -3 stays as -3.
Basically, memorize these mapping rules.
Hope this helped!