Calculating the value of the slope is important in defining a function. This lesson will teach you how to find the value of the slope. Slope is usually represented by the variable m.

The Value of the Slope of a Line

Video Source (08:42 mins) | Transcript

Zero and Undefined Slope

Video Source (02:24 mins) | Transcript

\( Slope = m = {\frac {rise}{run}} \)

- m = the variable we use for slope

- Rise = how far up your step goes
- Run = how far over your step goes

Remember to check to see if your slope should be positive or negative.

## Additional Resources

- Khan Academy: Worked Example: Slope from Graph (04:39 mins; Transcript)
- Khan Academy: Slope of a Horizontal Line (04:39 mins; Transcript)
- Khan Academy: Horizontal and Vertical Lines (05:14 mins; Transcript)

### Practice Problems

**Use the following graph to answer questions 1 through 7.**

- What is the slope of line A? (Solution
- What is the slope of line B? (Solution
- What is the slope of line C? (Solution
- What is the slope of line D? (Solution
- What is the slope of line E? (Solution
- What is the slope of a horizontal line? (Solution
- What is the slope of a vertical line? (Solution

## Need More Help?

- Study other Math Lessons in the Resource Center.
- Visit the Online Tutoring Resources in the Resource Center.
- Contact your Instructor.
- If you still need help, Schedule a Tutor.