Learn about the slope-intercept form of two-variable linear equations, and how to interpret it to find the slope and y-intercept of their line.

Linear functions are usually written in either slope-intercept form or standard form. We need a thorough and flexible understanding of these forms in order to approach many SAT questions …

If you are given the equation of the line, you can: -- Change the equation into slope-intercept form: y=mx+b and "m" will be the slope. -- Or, you can calculate two points using the equation and …

Learn what x- and y-intercepts are. The equations used in this video are y = 0.5x - 3 and 5x + 6y = 30.

With differentiation, you can start with a function f and then obtain a function which describes the exact rate of change of f at any point on its graph, called the derivative of f.

In a linear equation (straight line type of equation), that can only ever happen when the line is perfectly vertical. So more than one y-value corresponds to the exact same x value.

Slope-intercept form (y=mx+b) of linear equations highlights the slope (m) and the y-intercept (b) of a line. Watch this video to learn more about it and see some examples.

Learn how to calculate the slope of the line in a graph by finding the change in y and the change in x. Created by Sal Khan and Monterey Institute for Technology and Education.

Sal explains what inverse functions are. Then he explains how to algebraically find the inverse of a function and looks at the graphical relationship between inverse functions.

Practice Up next for you: Solutions to 2-variable equations Get 3 of 4 questions to level up!