Input, The number you put into the function, Output, The answer the function gives you, 𝑓(3), Put 3 into the function, y=2x+1, Makes a straight line graph, y=x2, Makes a curved graph, Function, A rule that connects input and output, f(x)=x+4, Add 4 to the input, f(2)=5, The output is 5 when the input is 2, y=3x, Multiply the input by 3

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