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cricket20 [7]
4 years ago
10

Write an appropriate direct variation equation if y = 8 when x = 2

Mathematics
1 answer:
emmasim [6.3K]4 years ago
3 0
\bf \qquad \qquad \textit{direct proportional variation}\\\\
\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad  y=kx\impliedby 
\begin{array}{llll}
k=constant\ of\\
variation
\end{array}\\\\
-------------------------------\\\\

\begin{cases}
y=8\\
x=2
\end{cases}\implies 8=k2\implies \cfrac{8}{2}=k\implies 4=k
\\\\\\
thus\qquad \qquad \boxed{y=4x}
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