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Mathematics 7 Online
OpenStudy (anonymous):

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? a. b = –a b. –b = –a c. b – a = 0 d. b(–a) = 0

OpenStudy (anonymous):

@Directrix

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