# Linear equations & graphs

This course is a part of
**Algebra I**, a 21-course Topic series from Khan Academy.

Learn about linear equations that contain two variables, and how these can be represented by graphical lines and tables of values.

This course contains 10 segments:

**Two-variable linear equations intro**

Understand what a solution to an equation really means. Practice plugging in values for variables to see whether or not an equation is true.

**x-intercepts and y-intercepts**

Learn about intercepts and practice finding them from graphs, tables, and equations.

**Slope**

Learn about slope (the steepness of a line) and how to find it.

**Horizontal & vertical lines**

You know what horizontal and vertical lines are, but how do their equations look? And what is their slope? Learn all about it in this tutorial.

**Intro to slope-intercept form**

Make an introduction with the most common form of linear equations, slope-intercept form! For example, y=3x+5 is a linear equation in slope-intercept form.

**Graphing slope-intercept equations**

Learn how to graph linear equations that are given in slope-intercept form. For example, graph y=2x+3.

**Writing slope-intercept equations**

Learn how to write the equation of a line (in slope-intercept form) when given the graph of the equation or two points on the line. For example, write the equation of the line that passes through the points (0,1) and (5,4).

**Point-slope form**

(y-b)=m(x-a)

**Standard form**

ax+by=c

**Summary: Forms of two-variable linear equations**

Take an overview of the three main forms of linear equations: slope-intercept, point-slope, and standard. Learn which form is most appropriate for different uses.

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Rating | Not enough ratings |
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Length | 10 segments |

Starts | On Demand (Start anytime) |

Cost | Free |

From | Khan Academy |

Download Videos | On all desktop and mobile devices |

Language | English |

Subjects | Mathematics |

Tags | Math Algebra I |

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Rating | Not enough ratings |
---|---|

Length | 10 segments |

Starts | On Demand (Start anytime) |

Cost | Free |

From | Khan Academy |

Download Videos | On all desktop and mobile devices |

Language | English |

Subjects | Mathematics |

Tags | Math Algebra I |

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