How Do I Use This Activity?

This activity allows the user to explore simple linear functions.

This Java applet requires a Java-capable browser. If you don't see the applet Java may not be functional in your browser or on your machine.

Controls and Output

As an example, we use function Y = X + 2

• To find out what the machine will do with a number:
  • Type the number into the X= [____] space (in our example, number 5 is typed in):
    

  • Press the Enter button:
    

  • Observe the resulting number in the Y= [____] window (in our example, number 7 is the result):
    

  • You can input as many numbers as you need to find the rule

• To check if you guessed the rule right, type numbers in the               Y = [___]*X + [___] spaces, and then press the Check formula button. You will see one of the two messages under the picture of the machine: either Correct answer! or Try again!
• To set a new function machine (that is, a new rule), click once on the Set new function button: