Before mentioning the word "slope", it's wise to have students explore the concept in contexts they can relate to.
In this resource, you'll have what you need to ensure students are introduced to the concepts of linear and proportional linear relationships.
First, a "foldable" notes resource is included, complete with tables, graphs, and necessary vocabulary. Photos of the foldable assembly are included for your reference.
Second, a 4-corners formative assessment, complete with teacher notes, is included to check students' understanding. This activity begins with students working individually and transitions to a cooperative task, promoting student discourse.
Sample answer keys are also included for your convenience.