Tell whether each statement is sometimes, always or never true: the highest power of the variable in a quadratic function is 2. a sometimes b always c never tell whether each statement is sometimes, always or never true: the range of a quadratic function is the set of all real numbers. a sometimes b always c never tell whether each statement is sometimes, always or never true: the graph of a quadratic function contains the point (0, 0). a sometimes b always c never tell whether each statement is sometimes, always or never true: the vertex of a parabola occurs at the minimum value of the function. a sometimes b always c never tell whether each statement is sometimes, always or never true: the graph of a quadratic function that has a minimum opens upward. a sometimes b always c never