B. Greatest IntegerThe greatest integer function (also called a step function) is actually a piecewise defined function with a special definition. The function has the notation or when it is written, but the TI-89 designates this function by . It can be accessed in the catalog, or you can type it in using alpha. The value of the function is the greatest integer less than or equal to x. So, f(1)=1 and f(1.4)=1. Since this is a piecewise function you should use the Dot mode.

Press to

access Y=Editor. Then

press

and scroll toint(.Press ENTER and

complete entering

the function.Select the function, then

press and

select 2:Dot mode.Now press to

select the Zoom Decimal

window.Press ENTER to draw

the graph.