The red line on this line is right above .9 and so the red line represents the value of .9 on this number line.
Decimal values can be represented on a number line like the one shown here.
The red line on this line is right above .9 and so the red line represents
the value of .9 on this number line.
Here's another example.
In this example the red line is above the .2 and so the red line represents
the value of .2 on this number line.
Now you get to try a few for yourself.