Scatterplot

A scatter plot is a relatively simple expression of data which measures 2 sets of variables scattered at points across an x and y axis.  one only need to find the intersection of the points to understand the number represented. This scatterplot is a comparison of height and weight of different people.  The x represents the person's weight and the y their height. 

http://www.mathsisfun.com/definitions/scatter-plot.html