Functions of x are mathematical expressions that involve the variable x. They represent relationships between inputs (x-values) and outputs (y-values) in a mathematical equation or formula.
Think of functions of x as recipes for baking cookies. The ingredients you put into the recipe (the values you assign to x) determine the outcome (the y-values or results).
Domain: The set of all possible input values (x-values) for a function.
Range: The set of all possible output values (y-values) for a function.
Graphing: Representing a function visually on a coordinate plane.
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