Quadratic graphs have several properties such as shape, vertex and direction that help us solve several types of application questions. The vertex, the quadratic minimum and the quadratic maximum are also helpful when answering problems associated with area, speed and direction. We find the minimum if the parabola opens "up" and the maximum if the parabola opens "down."
Sample Problems (4)
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A rocket is shot up so its height in meters 't' sec. after launch is given by h(t) = -8t² + 80t + 25.
A town is fencing in a playground whihc is bordered on one side by a building. The plan is to use 640 ft of fencing on the other three sides.