My first thought is that this should be drawn as the student needs to create a graph. But if that is not possible, include a TN that says something like "Print shows a blank grid for a graph. The grid includes an x- and y-axis with 6 additional horizontal lines." It might be helpful to see the previous question - is question 9 indicating that EACH horizontal line is considered an "axis line" and those are what the student is supposed to label - or are they truly talking about the "axis" lines (which I would take to mean the bottom line and the line to the left (x- and y-axis))?
The 'Title:' should be centered above the graph and the 'Key:' should be between the title and the graph. I'd put 'Key:' in cell 7 as that is where a key usually is in braille.