



 
Hi Mike, y = x^{2}  2 is a quadratic equation of the form y = ax^{2} + bx + c, let a = 1, b = 0 and c = 2. You can certainly plot the graph by using values of x from 2 to 2 but I want to show you another way. I expect that you know the graph of y = x^{2} If you compare the functions y = x^{2} and y = x^{2}  2, call them (1) and (2), the difference is that in (2) for each value of x the corresponding value of y is 2 less than in (1). Hence when plotting (2) the points on the graph of (1) are moved down two units.
Thus the graph of y = x^{2}  2 is
Penny  


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