Question

Suppose that y varies inversely with x, and y = 4 when x = 7. What is an equation for the inverse variation?

Answer 1

if y varies inversely as x,
y=k/x when y=4 and x=7
substituting it into the equation,we have
4=k/7
k=4*7
k=28
the equation for the inverse variation is
y=28/x