If you already have a Khan Academy account, then just log in using your account.
If you don't have an account, sign up (for free) using an e-mail address you check regularly. They can send you scores and updates.
TWO OPTIONS
Work through Khan Academy practice questions assigned. You may do as many or as few as you like, but if you get stuck, there are instructional videos that can show you how to work through the given topic. The list of topics that you will need to know for the quiz are in the attached document.
Complete the Extra practice linked in the Homework assignment at the top of the page
Attached are the first 3 pages of the solutions from the continuity homework (textbook section 2.5). I'm having some issues with my scanner, so I will update this document as the scanning completes.