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Graphing Points on a LineHere 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: We can number some of the points to make them easier to find. The numbers get bigger from left to right: Right now, Sam is sitting on point 4: On this line, only the even numbers are labeled. The other numbers are marked like this: I. This mark is called a tick mark. If Sam wants to find point 5, what should he do? Sam starts at 0, 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. Sam makes a big green dot to show where he has been. He labels the dot too, so you can tell what it is. Sam just graphed point 5. 
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