Question

On a number line, a number, b, is located the same distance from 0 as another number, a, but in the opposite direction.

The number b varies directly with the number a. For example b = 22 when a = -22. Which equation represents this
direct variation between a and b?
b=-a
0-b=-a
O b-a=0
Ob(-a)=0

Answer 1

The equation that represents the direct variation between a and b in this scenario is:

b = -a

This equation states that b is equal to the opposite of a, which aligns with the given information that b is located the same distance from 0 as a but in the opposite direction.