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pishuonlain [190]
3 years ago
7

Determine whether y varies directly with x. If so, find the constant of variation k.

Mathematics
1 answer:
kumpel [21]3 years ago
5 0
Direct variation is y=kx, inverse variation is y=k/x....

-5y=-2x divide both sides by -5

y=2.5x

So this is a direct variation with a constant of 2.5
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Extra info (optional section):

  • We can rule out choice A because negative x values work in the domain. For instance, if x = -1, then it leads to y = (1/2)^x = (1/2)^(-1) = 2. The negative exponent will apply the reciprocal operation to the base fraction.
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