Me figure out where to put these. i'm confused on how this works

The number line has small marks at each tenth and a big mark at each whole number. So, if you wanted to do -6.3, then you would do the same thing you did with -5 1/2(5.5) and count, in this example, three tick marks to the left of the -6 to get where -6.3 is. Same for all of the other ones there.

What is the diagram u didn't post that