# Quadratic Functions: Question Preview (ID: 20961)

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When does a quadratic function have 2 real solutions? |
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a) When the discriminant is greater than 0 | b) When the discriminant is less than 0 | c) When the discriminant is equal to 0 | d) Never | |

When does a quadratic function have 1 real solution? |
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a) When the discriminant is greater than 0 | b) When the discriminant is less than 0 | c) When the discriminant is equal to 0 | d) Never | |

When does a quadratic function have 0 real solutions (2 complex)? |
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a) When the discriminant is greater than 0 | b) When the discriminant is less than 0 | c) When the discriminant is equal to 0 | d) Never | |

When does the graph of the quadratic open upwards? |
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a) When a is positive | b) When a is negative | c) When a is zero | d) Never | |

When does the graph of a quadratic open downwards? |
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a) When a is positive | b) When a is negative | c) When a is zero | d) Never | |

When does a quadratic function have a maximum? |
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a) When the graph opens upwards | b) When the graph opens downwards | c) When a is positve | d) Never | |

When does a quadratic function have a minimum? |
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a) When a is positive | b) When a is negative | c) When the graph opens upwards | d) Both answers 1 and 3 are correct | |

What is the equation of the axis of symmetry of a quadratic function? |
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a) x = -b/2a | b) b^2-4ac | c) x = b/2a | d) x = -b/4a | |

When can a set of data be modeled by a quadratic function? |
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a) When the first differences are constant | b) When the second differences are constant | c) When the third differences are constant | d) When the fourth differences are constant | |

What is the coordinate of the vertex of a quadratic function? |
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a) (x, y) | b) (-b/2a, b/2a) | c) (-b/2a, f(-b/2a) | d) (-h,-k) | |

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