Constructing+and+interpreting+bar,+column+and+line+graphs.

Hey there! You have probably come to read about how to interpret column, line and bar graphs, so I'll try and make this easy for you. Here is an example of a Column graph: Column graphs can be identified by the 'columns' that run vertically on the page. This graph looks pretty much the same as a bar graph, but bar graphs run horizontally across the page.

Line graphs are useful in that they show the relationship between two variables. The independent variable is usually placed on the X-axis and the dependent variable is placed on the Y-axis. To draw a graph, you may need to first sort your data into groups. A scale for each axis must be selected and numbered. You can usually use the column headings from the table of results you are plotting as the headings for your two axes. One such example is:

To read these graphs...... Look, I'm going to assume you all don't have any idea how to read them, so, continuing on... To read these graphs, simply go the point that you are trying to find, (e.g Temurature in degrees centigrade [Graph above]) and read acroos untill you get to the number of the Y-Axis. So if I was looking at the above graph, and was trying to get the pressure for 50 degrees centigrade, I would read across from where the line intercepts the line for 50 C, and i would get the number '100' on the PIM column. Simple enough?