To graph a linear relation from an equation, first create a table of values by substituting different values for the variable x into the equation and calculating the corresponding y values. Then plot the points from the table on a graph grid and connect them with a straight line. The document provides an example of graphing the equation y = -4x + 6 by creating a table with x values of -1, 0, and 1 and the corresponding y values. It also includes practice problems asking the reader to graph other linear equations by first making tables of x and y values.