Question

Is y=5x directly proportional? Why or why not?

Answer 1

\(\begin{array}{cccllll}
\textit{something }&\textit{varies directly to }&\textit{something else}\\ \quad \\
\textit{something }&={\color{red}{ \textit{some value }}}&\textit{something else}\\ \quad \\
y&={\color{red}{ n}}&x&\implies y={\color{red}{ n}}x
\end{array}\)

varying directly = directly proportional

Answer 2

Yes, and JDoe's "n" is called "the constant of proportionality.

Inverse proportion would look like y=n/x.

Answer 3

Thank you both.

Answer 4

My pleasure!