Evaluating a function means finding the value of a function that corresponds to a given value of x. To do this, simply replace all the x variables with whatever x has been assigned.
Our function is
[tex]y=2x+3[/tex]
For the given values on the table, we have the corresponding y values
[tex]\begin{gathered} y(2)=2\cdot(2)+3=4+3=7 \\ y(6)=2\cdot(6)+3=12+3=15 \\ y(8)=2\cdot(8)+3=16+3=19 \\ y(10)=2\cdot(10)+3=20+3=23 \end{gathered}[/tex]
