My 8th graders need a lot of practice when it comes to graphing linear equations, and I've found task cards to be one of the activities that gets them to really spend time on this concept.
This set of task cards has 16 different systems that should be graphed to solve. Some equations are in slope-intercept form and some are in standard form, for a good mix of practice with both. All systems have one solution; there are no infinite solutions or no solutions in this mix.
There are several ways these task cards can be used. One of my favorite ways is to use them for playing Solve Crumple Toss: students come up to get their answers verified, then get to crumple the card and shoot for the trash can. Recently I've combined the task cards with MyPaths' "Vocabulary Games Sunken Treasure" powerpoint for a fun way to get students out of their seats as they review.
I hope your students enjoy their practice!