This PowerPoint has two real world problems Instagram posts and cell phone plans, vocabulary, exit questions, templates for notes; it satisfies the requirement for common core 8.EE.8 and several other standards. The first problem model is a one-step equation the second problem is comparison of two cell phone plans. The vocabulary slide defines independent and dependent variables. Review the notes for each slide because they describe key concepts for the students. The white note taking icon in the upper right corner indicates which slide to take notes on. It is well suited for the intermediate (middle) school students.