[size=200]1) Input a value for x at the top of the machine and watch the machine produce the output. [br]Try a few different values of x. [br][br]2) Change the function's expression by typing in the white input box at the front of the machine, or use preset functions in the drop down list as shown.[br][br]Repeat step 1)[br][br]A function's output depends on the input value and the function's algebraic expression![br][/size]

[size=150][size=200]See an alternative function machine that processes patterns, numbers and simple equations.[br][br][url=https://phet.colorado.edu/sims/html/function-builder/latest/function-builder_en.html]https://phet.colorado.edu/sims/html/function-builder/latest/function-builder_en.html[/url][/size][/size]