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 [tex]y=kx[/tex], where,
k = Constant of variation.
Upon substituting our given values, we will get:
[tex]R=k*S[/tex]
[tex]80=k*16[/tex]
[tex]\frac{80}{16}=\frac{k*16}{16}[/tex]
[tex]5=k[/tex]
Therefore, the constant of variation is 5 and option B is the correct choice.
