Given,
The value of y is 3 when the value of x is 9.
x is directly proportional to y.
The value of x is 18.
The value of y is,
[tex]\begin{gathered} \frac{3}{y}=\frac{9}{18} \\ 9\times y=3\times18 \\ y=\frac{54}{9} \\ y=6 \end{gathered}[/tex]
Hence, the value of y is 6.
