A dot plot or dot chart consists of data points plotted on a graph. The Federal Reserve uses dot plots to show its predicted interest rate outlook.

Plotting linear graphs Going from rule to graph To sketch a linear graph from a rule, determine two points that satisfy the rule and connect them with a straight line. Two commonly used methods are: ...

Variance is a measurement of the spread between numbers in a data set. Investors use the variance equation to evaluate a portfolio’s asset allocation.