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= 2 when a = - 3 -2. Which equation represents this direct variation between a and b? Ob= -a U b = a Ob-a=0 Ob(-a) = 0​

Answer 1

Answer: b = - a

Explanation:

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

If b varies directly as a

Then,

b = - ka

Hence the opposite variation or relationship between a and b means they both carry opposite signs

Hence,

b = - a