Question 1196554
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Here are two resources to check out
<a href = "https://www.mathsisfun.com/sets/function.html">https://www.mathsisfun.com/sets/function.html</a>
<a href = "https://tutorial.math.lamar.edu/Classes/Alg/FunctionDefn.aspx">https://tutorial.math.lamar.edu/Classes/Alg/FunctionDefn.aspx</a>
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