Question

Y varies inversely as x. y = 18 when x = 7. Find y when x = 3.y=(Simplify your answer.)

Answer 1

`\begin{gathered} y=(k)/(x) \\ \text{when y = 18, x = 7} \\ k\text{ = xy = 18}*7\text{ = 126} \\ \text{Also, using} \\ y=(k)/(x) \\ y\text{ =}(126)/(3)\text{ = 42} \end{gathered}`