Tell whether each statement is sometimes, always, or never true. 39. The graph of a quadratic function is a straight line. 40. The range of a quadratic function is the set of all real numbers. 41. The highest power in a quadratic function is 2. 42. The graph of a quadratic function contains the point (0, 0). 43. The vertex of a parabola occurs at the minimum value of the function. 44. The graph of a quadratic function that has a minimum opens upward. 9-1 Identifying Quadratic Function