Is 5y=−4x a direct variation equation and if so, what is the constant of variation?

1 Answer
Ratnaker Mehta
Jun 17, 2016

The reqd. constant of variation is k=−45.

Explanation:

Observe that if y varies directly as x, i.e., y∝x, then using k≠0 as constant of variation, the eqn. is written y=kx. ...(1)

In our case, we are given that, 5y=−4x, i.e.,
y=(−45)x.... (2)

comparing (1) & (2), the reqd. constant of variation is k=−45.

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