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Chameleon Graphing

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Chameleon Home
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Introduction
The Line
 Negatives
The Plane
Scale
Glossary
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For Grownups
 

Graphing Points on a Line

Here is a line:

<------------------------------->

The arrows at each end show that the line really goes on forever.

Each place on the line is called a point. A few of the points on this line are marked with red dots:

<---------o-o-----o------o----o------>

We can number some of the points to make them easier to find. The numbers get bigger from left to right:

<----0---1---2---3---4---5---6--->

Right now, Sam is sitting on point 4:

<----0---1---2---3---Sam---5---6--->



On this line, only the even numbers are labeled. The other numbers are marked like this: I. This mark is called a tick mark.

<----0---|---2---|---4---|---6--->

If Sam wants to find point 5, what should he do?

    Sam starts at 0,

<----Sam---|---2---|---4---|---6--->

    and crawls forward. Sam knows that 5 is 1 more than 4, so he counts one tick mark after 4.

    Now Sam is at point 5.

<----0---|---2---|---4---Sam---6--->

    Sam makes a big green dot to show where he has been. He labels the dot too, so you can tell what it is.

<----0---|---2---|---4---*---6--->

Sam just graphed point 5.

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