A dance school has 54 students who learn salsa, and 23 of those students also learn ballet. There are 15 students who do not lea
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The Quadratic Function has the domain as the set of all real numbers.
For the range, start from minimum value to maximum value.
But because the parabola is downward as a < 0. Thus, there are no minimum value but the maximum value instead.
Therefore the range is y <= -4