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 = 2b equals 2 and StartFraction 3 Over 4 EndFraction. when a = - 2a equals negative 2 and StartFraction 3 Over 4 EndFraction ... Which equation represents this direct variation between a and b?

b = - a

-b = - a

b - a = 0

b (-a) = 0

Question

Mathematics

Alisa Hunt

3 November, 13:21

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 = 2b equals 2 and StartFraction 3 Over 4 EndFraction. when a = - 2a equals negative 2 and StartFraction 3 Over 4 EndFraction ... Which equation represents this direct variation between a and b?

b = - a

-b = - a

b - a = 0

b (-a) = 0

+2

Answers (2)

Know the Answer?

Reginald Fry · Answer 1

b=-a

Step-by-step explanation:

if the distance from origin 0 of b is the same as the distance of a from b but in opposite directions, this makes b differ from a by polarity but with similar values.

Aron Keller · Answer 2

Yes! The correct answer is A.) b = - a

Step-by-step explanation:

I did the Unit test and i got it correct.