Question

the number line shows maries walk from her house.
marie walks 120 yards west, stops, and turns around. then she walks 120 yards east.
what is the total change in distance, in yards, from maries house?
a. 0
b. 240
c. 120
d. 6

Explanation:

Step1: Define west as negative

Westward movement: $-120$ yards

Step2: Define east as positive

Eastward movement: $+120$ yards

Step3: Calculate total change

Add the two movements: $-120 + 120$

Answer:

A. 0