Graphing lines

What this lesson shows

Let's build y = 2x + 1 one piece at a time. Start with the simplest line there is: y equals x. Whatever number you pick… you get the same one back. Zero gives zero. One gives one. Two gives two.

Try it yourself

Real questions from this lesson's worksheets — answers below each one.

1. Plot the point (1, 1) on the coordinate plane.
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   1,1
2. To plot (1, 1), after moving across you move up. How many units?
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   1
3. Plot the point (1, 2) on the coordinate plane.
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   1,2
4. To plot (1, 2), which way is the FIRST move?
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   Right