INSTRUCTORSCarleen EatonGrant Fraser
Loading video...

Start Learning Now

Our free lessons will get you started (Flash® 10 required).
Get immediate access to our entire library.

Sign up for

Membership Overview

  • Unlimited access to our entire library of courses.
  • Search and jump to exactly what you want to learn.
  • *Ask questions and get answers from the community and our teachers!
  • Practice questions with step-by-step solutions.
  • Download lesson files for programming and software training practice.
  • Track your course viewing progress.
  • Download lecture slides for taking notes.
  • Learn at your own pace... anytime, anywhere!


  • The slope of a straight line is a measure of how steep the line is. Lines that increase as x increases have positive slopes, those that decrease as x increases have negative slopes.

  • Slope is defined to be the change in the y-coordinates of two points divided by the change in the x-coordinates of those points.

  • The slope is the same no matter which two points you pick to compute it.

  • A vertical line has no slope, a horizontal line has a slope of 0.

  • Non-vertical parallel lines have the same slope, non-vertical perpendicular lines have slopes whose product is – 1.


Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.