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 = -2 when a = -2 Which equation represents this direct variation between a and b?
Ob-a
O-b-a
ob-a = 0
b(-a) = 0

THE ANSWER IS A NOT C