Now that you've made your own function, use it! Type [code](1.5,f(1.5))[/code] to use the function and plot the result as a input/output pair point.

As you can see the code plots the point [code](1.5,2)[/code] because [code]f(1.5)=2*1.5-1=2[/code]. In other words [code](1.5,2)[/code] is an input/output pair of the function [code]f[/code]. Now of course you could have done this without a function, but that's not the point. The point here was to see a function in action that [i]you[/i] made! Nice job![br][br]One thing to note: if you type the code [code](1.5,f(2))[/code] this will NOT plot a point on the function because it is NOT an input/output pair of [code]f[/code]. To plot points on any function (including this one) you always need to type code such as [code](#,f(#))[/code] where you put an actual number in place of "[code]#[/code]", and you must use the same number in both places.

Move on to the next activity to continue looking at the function you made.