[tex]\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\\
\qquad variation
\end{array}\\\\
-------------------------------[/tex]
[tex]\bf \begin{array}{ccll}
\stackrel{\stackrel{x}{lbs}}{bananas}&\stackrel{\stackrel{y}{lbs}}{price}\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
1&0.59(1)\\
2&0.59(3)\\
3&0.59(2)\\
4&0.59(4)\\
x&0.59(x)\\
\end{array}\implies y=\stackrel{k}{\boxed{0.59}}x[/tex]
