Numbers not creating a line graph I'm quite new to Numbers (and spreadsheets programs in general) but I need to create a simple line graph based of a spreadsheet but for some reason Numbers is not making the lines of the graph even though the data is there.



What I'm doing wrong?
It is a bit hard to say from the picture you have shared but you may not be doing anything wrong at all. Here is a chart I created with similar data with yours. 



I just selected the numbers to be charted (but did not select either the header row or the header column) and then clicked on Chart in Numbers toolbar at the top and selected the icon representing the 2D line chart.

Numbers behave in a weird fashion sometimes in creating charts in my experience. This happens to me occasionally even when I am creating simple charts. When this happens, I create a new file, copy the data only to the new file and create a new chart usually using the same steps. Those steps that have failed in my first trial usually work in the second trial!