| This unit explains the steps we can take in order
          represent whole, rational and irrational numbers on a straight line.The first part of the unit is similar to one we saw
          previously, which explains how whole numbers are represented on a
          straight line. The second part shows the geometric process we need to
          follow in order to represent rational numbers graphically. Finally,
          the third part illustrates a method which can be used to represent
          some irrational numbers. |