When you have the formula to graph a Parabola you need to be able to understand what it stands for/ says....
y = ax2 + bx + c
The A for how wide or how narrow the parabola will be.
The B stands for the line of symmetry
The C tells you if its will be facing up or will be facing down.( If a Parabola is facing down the C is negative but if its facing up then the C is Positive)
To find the axis of symmetry you use the formula......
X = - B
2A
Roots are where and when the parabola touches the X-axis
if the "a" is negative, it will face down, not "c". "c" changes the y intercept only, sliding the graph up and down as c changes.
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