Answer:
C & D
Step-by-step explanation:
A. 4 is greater than 0, so use the third equation to find f(x). 4*4 - 1 = 15, so A is wrong.
B. -2 is less than 0, so use the first equation to find f(x). -(-2) + 1 = 3, so B is also wrong.
C. -1 is less than 0, so use the first equation to find f(x). -(-1) + 1 = 2, so C is correct.
D. 1 is greater than 0, so use the third equation to find f(x). 1*1 - 1 = 0, so D is also correct.
