Graphing lines and slope

Algebra - The Coordinate Plane and Quadrants

Learn how coordinate planes work with x and y axes, quadrants, and plotting points. Discover how two numbers can locate any position on a map.

Algebra - What is Slope?

Learn what slope means using a biking analogy. Understand rise over run, positive/negative slopes, and how to find slope from two points on a graph.

Algebra - Calculating Slope from Two Points

Learn how to calculate slope using the formula m = (y2-y1)/(x2-x1). This video explains rise over run with a step-by-step example using two coordinate points.

Algebra - X-Intercepts and Y-Intercepts

Learn what intercepts are in math: where a line crosses the x-axis or y-axis. Understand how to identify x and y intercepts on a graph and which variable to set to zero.

Algebra - Finding Intercepts from an Equation

Learn how to find x and y-intercepts by setting variables to zero, then use them to graph linear equations. Includes a step-by-step example with 3x + 2y = 12.

Algebra - Slope-Intercept Form: y = mx + b

Learn slope-intercept form (y=mx+b) using a dog walking business example. Understand how m represents slope and b represents the y-intercept or starting value.

Algebra - Graphing a Line from y = mx + b

Learn how to graph linear equations in slope-intercept form using y-intercept and slope. Step-by-step tutorial with a real-world bracelet business example.

Algebra - Writing a Line's Equation from Two Points

Learn how to find a line's equation from two points using slope formula and point-slope form. Step-by-step example shows calculating slope and y-intercept.