219,598 views
15 votes
15 votes
When y varies directly as the square root of x, the variation equation is y=kx^2

I) y=50 and x=10 find k
ii) calculate y when x=30​

User Joe Walters
by
3.3k points

1 Answer

12 votes
12 votes


\qquad \qquad \textit{direct proportional variation} \\\\ \textit{\underline{y} varies directly with \underline{x}}\qquad \qquad \stackrel{\textit{constant of variation}}{y=\stackrel{\downarrow }{k}x~\hfill } \\\\ \textit{\underline{x} varies directly with }\underline{z^5}\qquad \qquad \stackrel{\textit{constant of variation}}{x=\stackrel{\downarrow }{k}z^5~\hfill } \\\\[-0.35em] ~\dotfill


\stackrel{ \begin{array}{llll} \textit{\tiny

User Ilu
by
3.1k points