Learning Resources

Journal

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• Transformational form allows you to read the vertex and the vertical stretch factor.
• Standard form allows you to read the vertical stretch factor, locate the vertex, and enter the function into a graphing calculator more easily in order to graph the function electronically.
• General form is the one in which the least amount of information about the properties of the parabola is readily available, but it does give the vertical stretch factor and the y - intercept; it is the form that is given by graphing calculators during regression analysis, and as a result you must be familiar with it.
• Direction of opening can be determined in all three forms by looking at the sign of a .