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Special Functions

• Step functions have graphs that are a series of steps. The steps can be going upward or downward.

• Constant functions are of the form f(x) = c, where c is a real number. Their graphs are horizontal lines.

• A piecewise function is defined differently on different intervals in the domain. The graph consists of a different graph on each interval

• The absolute value function is an example of a piecewise function. Its graph looks like a V, translated horizontally or vertically.