Usefulness of
the Cartesian Plane

If we look at the points plotted on the Cartesian
Plane, it is easy to see that, the more turns Andrew kicked, the higher his
kick went. It's easy to see this because the higher Andrew kicks, the higher
the position of the points on the Cartesian Plane.

In this case, we are not simply
making a diagram of what is happening in space, as we did in previous examples.
Instead, we are showing the relationship between a particular time (the turn
that Andrew is on) and a detail about the situation at that time (how high
Andrew kicked on that turn).

Putting points on to a Cartesian Plan is
called plotting the points, and the activity of plotting multiple points is
called graphing.

Graphing is very important in economics and other
sciences because graphing is used to visualize the relationships that exist
between different concepts or situations. These relationships can be described
algebraically, using mathematical equations. By matching the value of variables
in the equation to points on the graph the nature of the relationship between
the variables can be visualized using the graph. Other times, as in this case,
it is possible to go straight from information about the situation to creating
a graph.

Copyright Jen Schellinck, 2006