Help with graphing an equation

[houdini]

Hello!
I just want to say thanks in advance to whoever answers my question!!

Okay, so I have this problem on my math homework and it says to graph the equation. The equation is y= [x] + 2. The other one is y= 3[x]. I am not sure how to go about doing this. I don't know what the [ ] is called- but it is throwing me off. I think I am suppposed to make a list of x-values and then solve, only the [ ] means I have to have the lesser integer closest to the x-value or something, but I am very confused. Thanks for the help!

 

[galactus]

[x] means the floor function.

Here is a graph of 3*Floor(x).

As you mentioned, the floor is the nearest integer value less than a given value.

i.e. what is floor(2.5)?. It is 2

floor(2.99)=2

and so on

Some calculators will graph floor and ceiling functions. I done this on a graphing utility I downloaded.

 

[lookagain]

houdini,

what this graph (graphing program) does not show are the closed endpoints on
the left-hand sides of the line segments, and it does not show the open
endpoints on the right-hand sides of the line segments.