Quadratic equations
What goes up must come down: Quadratic equations are just one kind of non-linear pattern. When graphed, they describe a parabola or arc. In other words, quadratic equations describe something that arches up to a peak and then returns to its original level or something which drops to a low point and then rises. The rate of change on one side of the peak or low point is the same as on the other side and forms a smooth arch-like shape.
A quadratic equation that describes a real world parabolic pattern is another kind of model. Can you think of examples of processes that could be modeled with quadratic equations?
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