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Elementary Graphing, Distance Formula, & Graphs of Circles
Graphing in the plane consists of plotting coordinate pairs. In this section we will see
how the distance formula is used.
Graphing Points
When graphing a point (x, y), the first coordinate defines the location on the horizontal
axis and the second coordinate defines the location on the vertical axis. So a point (3,5)
would have a horizontal coordinate of 3 and a vertical coordinate of –5.
Elementary Graphing of Equations
If you are graphing equations for the first time and you have no specialized method to
use, you can graph many equations by doing the following:
1.
Find and plot all yintercepts. To find these let x = 0 and solve for y. Then find
and plot all xintercepts. To find these, let y=0 and solve for all values of x.
2.
Find and plot more points on in between the intercepts you plotted and on each
side of the intercepts you plotted.
3.
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 Fall '09
 Crandall
 Anthropology, Distance Formula

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