Determine Whether the Given Function Is Linear or Nonlinear $$\begin{array} { c | c } x & y = f ( x ) \\\hline 3 & 15 \\7 & 35 \\11 & 55 \\15 & 75\end{array}$$

Determine whether the given function is linear or nonlinear.
- $$\begin{array} { c | c } x & y = f ( x ) \\\hline 3 & 15 \\7 & 35 \\11 & 55 \\15 & 75\end{array}$$

A) linear
B) nonlinear