Building quadratic functions from geometric patterns | Algebra 1 (IM® v.360 aligned) | Khan Academy

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https://www.khanacademy.org/math/algebra-1-illustrative-math/x6418b49dfbc9d0c9:quadratic-functions-intro/x6418b49dfbc9d0c9:building-quadratic-functions-from-geometric-patterns/v/building-quadratic-functions-from-geometric-patterns

Represent growing patterns of squares using expressions and functions. Compare different expressions that represent the same pattern and match quadratic rules to the patterns they create.

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