What does ... mean?
Is it right that...?
How is it true that ... ?
Why is .... ?
Would it be ... if ... ?
We notice that ...
We know that ... because ...
We think that ... because ...
We wonder whether ...
We can change ...
Do all the graphs represent the same thing but in different ways?
How can we figure out what they are trying to graph?
If the line is not connected to the X's is it still called a line graph?
What is the scale?
What could these graphs be showing?