Question

Given: y varies directly with x and has a constant rate of change of 7.

When the value of y is 12, then the value of x would be _____.

equal to zero
less than 2
equal to 7
greater than 12

Answer 1

\(\bf \begin{array}{llll}
\textit{something }&\textit{varies directly to }&\textit{something else}\\ \quad \\
\textit{something }&=(\textit{some value })&\textit{something else}\\ \quad \\
y&=(n)&x
\end{array}\\ \quad \\
\textit{constant rate is }7\qquad thus \quad n=7\qquad thus\\ \quad \\
y=7x\qquad when \qquad y=12\qquad \implies 12=7x\)