Cost Of Notebooks
A) Describe the patterns you see on the graph
The patterns I see on the graph is that 1 note book cost $2. Then 2 notebooks cost $4 and 3 notebooks cost $6 . etc.
D) Is it possible to have points between the ones on the graph
Yes it is possible but not necessarily, not in this case because you can't buy half a notebook.
Example on how the graphing works.