Answer:
B. 5
Step-by-step explanation:
We have been given that R varies directly with S. When S is 16, R is 80. We are asked to find constant of variation.
We know that two directly proportional quantities are in form \(y=kx\), where,
k = Constant of variation.
Upon substituting our given values, we will get:
\(R=k*S\)
\(80=k*16\)
\(\frac{80}{16}=\frac{k*16}{16}\)
\(5=k\)
Therefore, the constant of variation is 5 and option B is the correct choice.
