What is true about a + b is:
Option C: -2 < a + b < -1
How to Interpret the Number Line?
A number line is a visual representation of numbers on a straight line, often used in elementary mathematics to teach number sequences, compare numbers, and perform arithmetic operations such as addition, subtraction, multiplication, and division.
In the given number line we see that a and b are less than zero.
Specifically:
a is less than 0 but greater than -1
b is less than -1 but greater than -1.5
Thus:
Their sum will be greater than -2 but less than zero