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OpenStudy (anonymous):
Which equation matches the graph? A) y = 2x2 B) y = -2x2 C) y = x2 - 4 D) y = -x2 - 4
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OpenStudy (anonymous):
It looks like the basic shape of the parabola (within a constant) is y = x^2 because if we change x from 0 by +/- 1 we go up 1 and if by +/- 2 we go up 2. OK. Now find the constant.
OpenStudy (anonymous):
by 4 for a change of +/- 2 I mean
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