Phone Plans #MFM2P #PBL

I’m already behind on my goal of blogging all of my MFM2P (grade 10 applied) activities for the semester. We did this one about 3 weeks ago.summary-2016-09-23-1

The prompt:lr3-phone-plans-info
2016.09.23notice.JPG

2016.09.23wonder.JPG

Today’s question:2016.09.23estimate.JPG

They went to their boards to solve. Most groups used a set of table of values. After they found their answers, I walked them through creating an equation to represent each phone plan and then using Desmos to find the point of intersection between them. They then sketched their graphs next to their tables. I only took a photo of one group’s board:IMG_20160922_114324.jpg

The next day students individually worked through a problem set on Khan Academy to solve linear systems graphically:
 Linear systems; solve graphically (use Desmos – help video here)

All materials for this activity are here.

– Laura Wheeler (Teacher @ Ridgemont High School, OCDSB; Ottawa, ON)

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