In this activity, students discover the relationship between a change in the dimensions of a rectangle and the change in the corresponding area. https://education.ti.com/en/activity/detail/comparing-areas-of-rectangles
Students are first introduced to the counting principle and the factorial symbol. Then, they will calculate combinations and permutations using these formulas and the nCr, n!, and nPr commands on the graphing calculator. https://education.ti.com/en/activity/detail/whats-your-combination
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