Hi

*Note: When Quantities vary directly,they are related by the relationship:

  k being  the constant of proportionality.

If w varies directly as z and w = 9 when z = -6, find w when z = 3

   w = kz

   9 = k*-6

   -3/2 = k

  w = (-3/2)x

  w = (-3/2)*3 = -9/2 when z = 3 

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