Question

The point a is shown on the number line below.

The distance between A and the point b is 3 1/2 units.
which number could represent the point b?

Answer 1

the answer is 3 1/2 or -3 1/2

Answer 2

Assuming that A is at point 1/2, you would add 1/2 to 3 1/2 or -3 1/2 (each one of these values would be 3 1/2 units away.) When you do this, you get the values -3.0 and 4.0, so the answer is A.