Create a table with two columns. Title the left hand column X and the right hand column Y. In the left hand column, enter some "likely" values, such as zero. Fill in the Y column by computing the Y value that corresponds to each X value in the table that does not have a corresponding Y value.
Locate key points that make interesting points for the table. It is also important to recognize a linear equation whose graph will be a straight line -- you will only need two points for these. A linear equation will have no variables with non integer exponents or exponents greater than 1 or exponents in denominators.
Plot the points from the table onto a Cartesian graph. Connect the points in the table to make a curve. If the curves are hard to generate, look for special points that can distort the curve. One of these is a place where the denominator is zero. Such a point generates an asymptote -- a line that the curve approaches closer and closer as the value of the line goes to infinity.