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9-78.
  1. John has to graph a set of parabolas of the form y = x2 − 4x + 2n where n is an integer and 0 ≤ n ≤ 6. What is the probability that one of these parabolas, chosen at random, will have: 9-78 HW eTool (Desmos). Homework Help ✎

    1. One x-intercept?

    2. Two x-intercepts?

    3. No x-intercepts?

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