Question

Look at this number line. Which expression has a negative value?

A. a-b
B. a+b
C. a-2
D. b-2​

Answer 1

D. b - 2

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