# Linear equations, functions, & graphs

This topic covers: - Intercepts of linear equations/functions - Slope of linear equations/functions - Slope-intercept, point-slope, & standard forms - Graphing linear equations/functions - Writing linear equations/functions - Interpreting linear equations/functions - Linear equations/functions word problems

This course contains 14 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.

**Interpreting linear functions and equations**

Solve word problems where you need to answer a question about a real-world relationship based on its mathematical model.

**Comparing linear functions**

Compare features of linear functions, such as slope and intercepts, where the functions are given in different forms—tables, graphs, or formulas.

**Constructing linear models for real-world relationships**

Learn how to represent real-world relationships (that are described verbally) with linear graphs, equations, or functions.

**Linear models word problems**

Solve general word problems about real-world relationships that can be modeled by linear equations or functions.

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Length | 14 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 |

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Rating | Not enough ratings |
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Length | 14 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 |

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