We have the function:
[tex]f(x)=x^2+4.[/tex]
We evaluate the function at x = a by replacing x by a in the definition of f(x).
We must evaluate the function at x = -2, -1, 0, 1 and 2.
Evaluating the function, we get:
[tex]\begin{gathered} f(-2)=(-2)^2+4=4+4=8, \\ f(-1)=(-1)^2+4=1+4=5, \\ f(0)=(0)^2+4=0+4=4, \\ f(1)=(1)^2+4=1+4=5, \\ f(2)=(2)^2+4=4+4=8. \end{gathered}[/tex]
Plotting the function and the points above, we get the following graph:
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