MA, Stanford University
Teaching in the San Francisco Bay Area
Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts
The crux of function notation comes in problems where you're asked to interpret key features of a graph. Here we look at finding the y for a given x (presented like "find f(2)"), and finding the x for a given y (presented like "what is x when f(x) = 2" ). The domain is the set of all possible x values, which is found looking at the horizontal x values, and the range is the set of all possible y values, which is found looking at the vertical y values. We can also apply a graphing transformation to the function, eventhough we don't know it's equation: f(x) + d represents shifting the entire graph up (or down) d units.
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