This real-life example truly engages the students and forces them to think about their expenses when it comes to No. 1 commmodity - their cell phone.
This activity reinforces the concepts when teaching solving a system of equations graphically.
Rubric included

Help
I have been a secondary Math teacher for 15 yrs. throughout NY. Throughout my career, I have taught everything from MS Math to College. Currently, I am a tenured math teacher in Westchester county. I look forward to sharing my activities.
