Common Straight Line Equations

This lesson covers:

  1. The common straight line equations you need to know & what they look like on a graph
Graph showing the x-axis highlighted in blue.

On the graph above, which axis is highlighted?

𝑥-axis

𝑦-axis

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Graph with highlighted vertical axis.

On the graph above, which axis is highlighted?

𝑥-axis

𝑦-axis

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Graph showing a vertical line at x equals 3

What line is shown on the graph above?

𝒙 = 3

𝒚 = 3𝒙

𝒚 = 3𝒙 + 3

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Graph showing a horizontal line at y equals 2.

What line is shown on the graph above?

𝒙 = 2

𝒚 = 𝒙 + 2

𝒚 = 2

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Graph showing a horizontal line at y equals 0 on a coordinate plane.

What line is shown on the graph above?

𝒙 = 0

𝒚 = 0

𝒚 = 𝒙 + 0

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Using pencil and paper sketch the line 𝑥 = -2 on a graph.


Once you're done, click 'Continue' to check your answer.

Graph showing the line x equals minus 2 on a coordinate plane.

Did you get it correct?

Yes

No

[0/1]

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Using pencil and paper sketch the line 𝑦 = 𝑥 on a graph.


Once you're done, click 'Continue' to check your answer.

Graph showing the line y equals x on a coordinate plane.

Did you get it correct?

Yes

No

[0/1]

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Using pencil and paper sketch the line 𝑦 = -𝑥 on a graph.


Once you're done, click 'Continue' to check your answer.

Graph showing the line y equals minus x on a coordinate plane.

Did you get it correct?

Yes

No

[0/1]

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The lines 𝑥 = 4, and 𝑦 = 7, are drawn on a graph. At which point will they cross?

(It may help to draw them out if you're unsure)


( , )

4
7

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The lines 𝑥 = -3, and 𝑦 = 0, are drawn on a graph. At which point will they cross?

(It may help to draw them out if you're unsure)


( , )

-3
0

0

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2