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29 September, 15:03

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 3/4when a = - 2 3/4. Which equation represents this direct variation between a and b?

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  1. 29 September, 15:08
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    a = - b

    Step-by-step explanation:

    a = kb

    -2 3/4 = k * 2 3/4

    k = - 1

    a = - 1 * b

    a = - b
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