Find the Equation of Variation If the Following Is True $r$

Multiple Choice

Find the equation of variation if the following is true.
-Suppose $r$ varies directly as $\mathrm { s }$ and $\mathrm { r } = 0.0714$ when $\mathrm { s } = 1$ .

A) $r = 14 \mathrm {~s}$
B) $r = 0.0714 \mathrm {~s}$
C) $\mathrm { r } = 15 \mathrm {~s}$
D) $r = 13 s$