A scatterplot is a type of diagram/graph using the coordinate grid system to display values for two variables for a set of data. The data is displayed as a collection of points, where each observation is represented by a dot., each having the value of one variable determine the position on the horizontal axis and the value of the other variable determine the position of the vertical axis. A trend line can then be inferred based on the direction and concentration of data points. When both variables increase, the trend line is positive. When one variable increases while the other decreases, this conveys a negative relationship. The above image is a very simple example of a scatterplot, comparing the price of some gem in relation to its size in carats. Here you can see the data is plotted as a series of plots, with an increasing trend line here showing that as the size in carats increases so does the price, conveying that this trend is positive.
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