This lesson builds on the work of Topic A by continuing to relate sequences to formulas or functions without explicitly defining function or function notation (however, students are using this notation and have been since Topic A).
This lesson builds upon students’ understanding of sequences by extending familiar sequences (the square numbers and the triangular numbers) to functions whose domains extend beyond the set of whole numbers and by asking students to continually consider what makes sense given the situation. While the word function appears in the student outcomes and teacher notes for this lesson, this term need not be used with students until introduced formally in Lesson 9.
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