Possible questions

Take a look at the graph below.

Graph which is the graph of y=x for negative values of x and the graph y= minus x for positive values of x, so the graph has a vertex at the origin.

How would you describe it?

What questions might you ask yourself about this graph?

Here are some questions that you might like to think about, if you have not already considered them.

  • Is this a proper function?

  • Does it matter that it has two different parts?

  • Is there a formula for this?

  • Are there other functions that look similar to this?

  • How could I move the ‘corner’?

  • How would a function like this occur?

  • How could it be used?

  • What could a function like this model?