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 (-3, -3) on the coordinate plane.
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   -3,-3
2. Plot the point (-3, -2) on the coordinate plane.
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   -3,-2
3. Plot the point (-3, 1) on the coordinate plane.
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   -3,1
4. Plot the point (-3, 3) on the coordinate plane.
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   -3,3