Plotting points will help us see the effect of the constants on the basic f(x)=x2 graph. We fill in the chart for all three functions.

The g(x) values are two more than the f(x) values. Also, the h(x) values are two less than the f(x) values. Now we will graph all three functions on the same rectangular coordinate system.

The graph of g(x)=x2+2 is the same as the graph of f(x)=x2 but shifted up 2 units.
The graph of h(x)=x2−2 is the same as the graph of f(x)=x2 but shifted down 2 units.