Question on Coordinate System
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There are three graphs on this page. You might need to hit the enlarge key a few times to make them readable. Can you look and see if on the lower left hand corner of any of these graphs, it is listing a "0" (zero) or an "O" for origin? I am not sure I can tell the difference, but hoping a trained eye can. Thank you.
SusanI believe that these are an "O" for origin. If you look specifically at question 33, there is definitely a difference in the shape of the O (at the origin) and the 0 (zero) in the number 320 above it on the y-axis. The zero is always more oval in shape, while the origin is round.
BettyThank you, Betty. I have two more questions related to these graphs that I am hoping you can help with. Would you use a number sign with the numbers on the x- and y-coordinates, and can you give me a quick guideline to help me know why or why not. Thank you so much.
SusanThis information is covered in the Guidelines and Standards for Tactile Graphics which is available for download from the BANA website. Near the beginning of Unit 6 Mathematical and Scientific Diagrams there is a chart which indicates when to use the numeric indicator. You omit them for Cartesian Graphs, but include them for Line Graphs. If you consider this to be a Cartesian graph, then you would omit the numeric indicator.
Betty
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