Question 572786
If you tabulate the x and y values (Plotting the data points may help too), you realize that this looks like a quadratic function, symmetrical with respect to {{{x=0}}}, varing little around zero, but increasing more and more steeply as you go away from zero on either side.
If you add {{{x^2}}} values to your tabulation, comparing {{{y}}} to {{{x^2}}}, you would realize that {{{y=x^2+1}}}.