Determine if the table below represents a linear function. If so, what's the rate of change? х у 1 1 2 4 3 9 4 16

The given table doesn't represent a linear function because y-values are the square power of x-values. Observe the following
[tex]\begin{gathered} 1^2=1 \\ 2^2=4 \\ 3^2=9 \\ 4^2=16 \end{gathered}[/tex]