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Which equations show direct variation between a and b? Choose all answers that are correct.

Ab =0.7a
Bb= 1/8a-3
C5(1/a)=b
D1a=b

Verified Answer :

meerkat18

a.) b = 0.7a
d) 1a = b

These two equation shows the direct variation. with the coefficient of a as the constant of variation.

y = kx ; where k is the constant of variation. y directly varies with x at the rate of k.

b = 0.7a   where b represents y ; a represents x; and 0.7 represents k.
1a = b where b represents y ; a represents x ; and 1 represents k.

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