Question

Choose a number line below to model the situation:

Sheldon drove 15 miles east and then drove 35 miles west.

Answer 1

I would make east be "to the right" and west be "to the left"
so look for an arrow that goes to the right for 15 steps, then an arrow with its "tail" at the end of the first arrow, but pointing to the left, and goes 35 steps to the left.