A function represents the relationship of two variables in which one variable depends on, or is a function of the other variable.
In the case of a simple graph of x and y values, the value of y depends on the value of x, or is a function of x; that means tha y = f(x).
Here we review a number of different forms of f(x) and what it means to evaluate and plot the limit of f(x).
Functions and limits
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X Y e P y=f(x) e P y=f(x)

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