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 you to determine whether the graph opens up or down.

The given range can help us to determine whether the graph of a quadratic function opens up or down.
If the range is [ 4, + ∞ ) it has a minimum point with coordinates ( x, 4 ). The vertex is the lowest point on the graph.
The graph opens up. 

The answer for this is 9/1253decimal form 0.007

If you make you answer for clear i can answer it : )