In this lesson, students are presented with graphs and tables and asked to determine which represent functions and which do not. A function associates exactly one output value y with each possible input value x. If more than one output value y is associated with a single input value x, that process does not describe a function.
Objectives
Students will understand the definition of function and use it to identify whether or not an input-output pairing represents a function.
Students will determine if a graph represents a function by using a moving vertical line.
Students will determine if a table of x- and y-values represents a function.
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