Question 535785
Two ways, compute some points by hand and plot them on graph paper, or use a spreadsheet or other math software to compute y values from a series of x values that you put in as givens.  You decide what x values to use; the y values result from the function described by the equation.
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This equation plots as a parabola that is open at the bottom (like an umbrella).  The highest point (maxima) is the coordinate, (0, 6), which is also the y intercept.
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To satisfy myself what it would look like, I plotted points from x = -5 to x = 5, at .5 intervals (the smaller the intervals, the smoother the curve when plotted by Excel).  Here are the values I computed and plotted:
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 x	  y
-5.0	-44.0
-4.5	-34.5
-4.0	-26.0
-3.5	-18.5
-3.0	-12.0
-2.5	-6.5
-2.0	-2.0
-1.5	1.5
-1.0	4.0
-0.5	5.5
0.0	6.0
0.5	5.5
1.0	4.0
1.5	1.5
2.0	-2.0
2.5	-6.5
3.0	-12.0
3.5	-18.5
4.0	-26.0
4.5	-34.5
5.0	-44.0
...
Hope this helps,
Lee