This is an ideal review activity for students who have studied equations of lines, slopes, parallel lines, perpendicular lines and finding the slope between two points. It is a game that is flexible enough to be played for 10-45 minutes and for groups of 3 or more students.
In this game students keep 5 cards representing slopes and intercepts in their hand. They draw "battle" cards that challenge them to complete a math task independently, challenging one other opponent, or everyone in the group battles at once. These problems range from creating lines with the greatest slopes, comparing intercepts, finding perpendicular and parallel slopes, to using number sense to compare results.
The game is easily differentiated, with simple slopes and integers for slope calculation through complex fractions that are not reduced to challenge students to find equivalents in multiple ways.