Texas Education Agency
Texas Gateway: Determining Intercepts and Zeros of Linear Functions
Given algebraic, tabular, or graphical representations of linear functions, the student will determine the intercepts of the graphs and the zeros of the function.
Purple Math
Purplemath: Using Slope and Y Intercept to Graph Lines
Demonstrates, step-by-step and with illustrations, how to use slope and the y-intercept to graph straight lines.
Cool Math
Coolmath: Perpendicular Lines
This CoolMath Resource will help students determine if lines are perpendicular by finding the slope, using the point-slope formula, and graphing.
Khan Academy
Khan Academy: Algebra I: Writing Linear Functions Word Problems
Find a linear function that represents a real-world relationship that is given verbally. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.