If you're seeing this message, it means we're having trouble loading external resources on our website.
If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
To log in and use all the features of Khan Academy, please enable JavaScript in your browser.
Unit 4: Linear equations & graphs
About this unit, two-variable linear equations intro.
- Two-variable linear equations intro (Opens a modal)
- Solutions to 2-variable equations (Opens a modal)
- Worked example: solutions to 2-variable equations (Opens a modal)
- Completing solutions to 2-variable equations (Opens a modal)
- Solutions to 2-variable equations Get 3 of 4 questions to level up!
- Complete solutions to 2-variable equations Get 3 of 4 questions to level up!
- Intro to slope (Opens a modal)
- Positive & negative slope (Opens a modal)
- Worked example: slope from graph (Opens a modal)
- Graphing a line given point and slope (Opens a modal)
- Calculating slope from tables (Opens a modal)
- Worked example: slope from two points (Opens a modal)
- Slope review (Opens a modal)
- Slope from graph Get 3 of 4 questions to level up!
- Graphing from slope Get 3 of 4 questions to level up!
- Slope in a table Get 3 of 4 questions to level up!
- Slope from two points Get 3 of 4 questions to level up!
Horizontal & vertical lines
- Slope of a horizontal line (Opens a modal)
- Horizontal & vertical lines (Opens a modal)
- Horizontal & vertical lines Get 5 of 7 questions to level up!
x-intercepts and y-intercepts
- Intro to intercepts (Opens a modal)
- x-intercept of a line (Opens a modal)
- Intercepts from an equation (Opens a modal)
- Intercepts from a table (Opens a modal)
- Intercepts of lines review (x-intercepts and y-intercepts) (Opens a modal)
- Intercepts from a graph Get 3 of 4 questions to level up!
- Intercepts from an equation Get 3 of 4 questions to level up!
- Intercepts from a table Get 3 of 4 questions to level up!
Applying intercepts and slope
- Slope, x-intercept, y-intercept meaning in context (Opens a modal)
- Slope and intercept meaning in context (Opens a modal)
- Slope and intercept meaning from a table (Opens a modal)
- Finding slope and intercepts from tables (Opens a modal)
- Linear functions word problem: fuel (Opens a modal)
- Relating linear contexts to graph features Get 5 of 7 questions to level up!
- Using slope and intercepts in context Get 3 of 4 questions to level up!
- Linear equations word problems: tables Get 3 of 4 questions to level up!
- Linear equations word problems: graphs Get 3 of 4 questions to level up!
- Graphing linear relationships word problems Get 3 of 4 questions to level up!
Modeling with linear equations and inequalities
- Comparing linear rates example (Opens a modal)
- Linear equations & graphs: FAQ (Opens a modal)
- Creativity break: How do you apply creativity in algebra (Opens a modal)
- Comparing linear rates word problems Get 3 of 4 questions to level up!
IMAGES
VIDEO
COMMENTS
A linear function is a function whose graph is a line. Linear functions can be written in the slope-intercept form of a line. where is the initial or starting value of the function (when input, ), and is the constant rate of change, or slope of the function. The y -intercept is at. Example 1.