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21 November, 21:26

Which of the following parabolas opens upward and appears narrower than y = - 3x2 + 2x - 1? A. y = 4x2 - 2x - 1 B. y = - 4x2 + 2x - 1 C. y = x2 + 4x D. y = - 2x2 + x + 3

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  1. 21 November, 23:26
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    All I know is if it's negative it's opening down and if it's positive it's opening upward.
  2. 21 November, 23:30
    0
    Choice A will open upward since it is positive and it will appear narrower because the bigger the coefficient, the narrower it is. This is because the coefficient is the slope.
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