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PLEASE HELP ME URGENT The graph of a quadratic function has a domain of (-∞, ∞) and range of [4, ∞). In two or more complete sentences, explain how the given range of the function can help you to determine
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PLEASE HELP ME URGENT The graph of a quadratic function has a domain of (-∞, ∞) and range of [4, ∞). In two or more complete sentences, explain how the given range of the function can help you to determine whether the graph opens up or down.

User Lachelle
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since the range is increasing then the graph must be openning up and we can also prove this by saying that this graph has an absoulte minimum at y=4
then it must not have any absoulte maximum sice parobals only have one extrema
User Brampage
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The minimum of the range is when x = 4 and the maximum  is when the function is + infinity  ;  therefore the graph  which is U shaped must open upwards.
User Adam McCrea
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8.3k points
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