I guees the question is to find the equation of the graph you have, so the graph is centered:
so the equation will be:
[tex]f(x)=x^2[/tex]
we can chec the function with the number of x so:
[tex]\begin{gathered} f(1)=1^2=\pm1 \\ f(2)=2^2=\pm4 \end{gathered}[/tex]
