For success in PreCalculus and Calculus, you must have an extremely high comfort level working with lines and slopes of lines.
This lesson offers an inanutshell review of essential concepts.
It might be all that you need!
For a thorough review, however, go through the following lessons in order.
Be sure
to clickclickclick the exercises in each section to check your understanding.
SLOPE OF LINES
essential concepts


Click here for a great exercise on finding equations of lines, written by one of my users (it opens in a new window).
Click the ‘New line’ button to get started.
Find the $y$intercept; find another point that lies on the intersections of the dashed grid lines, and determine the slope.
Type your equation at the bottom, and click ‘Graph my equation’ to
compare.
On this exercise, you will not key in your answer. However, you can check to see if your answer is correct. 
PROBLEM TYPES:
