math
posted by Ray on .
Ok we have to graph a step function. I am given y=[5x]. How do I write the chart for this in order to graph it?

in order to graph a step function/greatest integer function,, you need values of x (not only integers but also with decimal), for example,
if x=3, y=5(3)=15 ==> no problem since 15 is an integer
if x=3.1, y=5(3.1)=15.5 ==>if not an integer, get the greatest integer preceding the number, in this case 16 (16 comes before 15.5), thus y=16
if x=2.5, y=5(2.5) ==>12.5 ==>greatest integer preceding this is 12 (12 comes before 12.5), thus y=12
i think you must try several values of x, then plot it until you see the pattern,, just remember that y values should be integer,,
i hope i was able to help you.. =)