4. Graph your data. (a) Plot each trial on this grid. (b) Use a different symbol for each trial. (c) Make a key so that you are able to tell the trials apart. (d) Draw a trend line to characterize your data. Note: A trend line is not the same as a zigzag line that connects the points. A trend line is a line that shows the general trend of the data and, therefore, does not have to touch each point.