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OpenStudy (anonymous):
Identify the quadratic function from the choices below whose parabola opens upward. y = -5x – x2 + 3 y = x – 4x2 + 9 y = 3x2 – 12x + 1 y = -7x2 – 9x + 2
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OpenStudy (jackellyn):
The third one opens up
OpenStudy (anonymous):
the one with positive leading coefficient
OpenStudy (jackellyn):
yeah, like @satellite73 said, because +3 is greater than all of the other leading coefficients
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