What is a Scatter chart?

Scatter chart either shows the relationships in several data series or plots two groups of numbers as one series of XY co-ordinates. This chart shows uneven intervals or cluster of data and is commonly used for displaying scientific data.

X axis is usually assigned to an independent variable, the variable whose value is controlled or set by the experimenter. The Y variable then becomes the dependant variable. Its each value depends upon the corresponding value of variable X.