If y varies directly as x and $x = 15$ $x=15$ when $y = 3$ $y=3$ , then how do you find y when $x = 10$ $x=10$

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Answer 1 · 2018-03-17T11:07:47

$y = 2$ $y=2$

$y \propto x or y = k \cdot x; k$ $y prop x or y = k*x ; k$ is variation constant.

$x=15 ; y=3 :. 3= k*15 or k =3/15 or k = 1/5 or k =0.2$

Thus the variation equation is $y=0.2*x$

When $x=10 ; :. y= 0.2*10 or y=2$ [Ans]

If y varies directly as x and x=15x=15x=15 when y=3y=3y=3, then how do you find y when x=10x=10x=10