A. Facts
 The distance formula is used to find the distance between any two points on the graph.
 The distance formula is
 The distance formula comes from applying the Pythagorean Theorem to a right triangle ABC to find the distance (d) between A (x_{1}, y_{1}) and B (x_{2}, y_{2}).
(AB)^{2} = (AC)^{2} + (BC)^{2} d^{2} = (x_{2}  x_{1})^{2} + (y_{2}  y_{1})^{2}
B. Applying the Distance Formula
 Label the points (x_{1}, y_{1}) and (x_{2}, y_{2}).
 Substitute the values into the formula.
 Simplify the expression.
 Round to the nearest 100^{th} when necessary.


