Categories F-IF.7 Graphing “Can’t graph it. Too big a line.” Post author By mpershan Post date August 16, 2012 2 Comments on “Can’t graph it. Too big a line.” “The line’s too big.” So what? Why does this matter to the student, and what does this reveal about his understanding of graphing? Share this:EmailPrint ← A classic: Subtracting radicals → Backtracking 2 replies on ““Can’t graph it. Too big a line.”” I may be WAY oversimplifying here, but my guess is that the student is so used to standard 1 to 1 scaling between the axes that this function simply won’t ‘fit’ into the graph s/he has envisioned. I agree, this student does not understand scale in this instance. I would suggest that the student label the giant tic marks on the axes. This would give us a scale, and a clue that we need to change the window settings Also if they are using the calculator, and also using x for multiply as well as x for they will be doomed. If this does not show up as an italic x, then by hand I use two c s back to back. Why don’t we teach dot to elementary students, so they only have to learn one thing? I now use the asterisk as shown on TI83, because it’s easy to change the multiplication x into the asterisk. Then they get fed up of three (!) lines and put a dot because math is for the lazy (my math motto). Comments are closed.