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.
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
