hello
to find the instantaneous rate by substituting the value of the x in thr function to find the derivative of that function
[tex]\begin{gathered} y=2x^2+1 \\ x=1 \\ y=2(1)^2+1 \\ y=(2\times1)+1 \\ y=2+1 \\ y=3 \end{gathered}[/tex]
the instantenous rate or change of the function is y = 3
