Mini Lesson Quick Notes over Equations of Horizontal and Vertical Lines. This FREEBIE product is NOTES ONLY. Typically, my other products include notes AND a supplemental assignment. Tutorial video included (no prep to you!) and can be found on my YouTube Channel, mandy’s math world, on the Linear Functions Unit Playlist!This is a fairly easy concept (that often students get confused), but I do like to teach it as a separate short lesson. I typically teach this the same day I teach x and y int