Alissa Fong

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

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Function Notation - Problem 3

Alissa Fong
Alissa Fong

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

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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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