Answer:
b. 200
Step-by-step explanation:
We have been given that y varies inversely as x.
Since we know that equation that represents the inversely proportional relation between y and x is:\(y=\frac{k}{x}\), where,
k= Constant of proportionality.
Upon substituting our given values in above equation we will get,
\(40=\frac{k}{5}\)
Let us multiply both sides of our equation by 5.
\(40\times 5=\frac{k}{5}\times 5\)
\(200=k\)
Therefore, constant of proportionality for our given quantities is 200 and option b is the correct choice.
