Answer:
D. b - 2
Step-by-step explanation:
First, we read the values of a and b from the number line.
a = 2
b = -1
Now we evaluate each expression.
A. a - b = 2 - (-1) = 2 + 1 = 3 positive, not negative
B. a + b = 2 + (-1) = 2 - 1 = 1 positive, not negative
C. a - 2 = 2 - 2 = 0 zero, not negative
D. b - 2 = -1 - 2 = -3 negative
Answer: D. b - 2
