I've a dataset of - Number of accidents that happens in each state. The dataset spans from 2001 to 2014.
Which plot should I use to represent the information - number of accidents in each state per year, in 1 plot.
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For time data, you should often use a simple Line Chart, with time on the X axis and the other variable dependent of time (here the number of accident) on the Y axis. Since you have several states to plot, you can simply draw one line for each state. to differentiate them, you can use a visualization variable : color, width, pattern ... Color is probably the most relevant here. You can as well write the name of the state near each line.