Reflection: Intervention and Extension Sequences as Functions (Part 1 of 2) - Section 2: New Info


Triangular numbers have many interesting properties. For example, a triangular number sequence can never end with the digits 2, 4, 7, or 9. 

I like to ask my students if they can find any other interesting properties of the triangular numbers. One possible answer is that triangular numbers are either divisible by 3 or have a remainder of 1 when divided by 9. This can be an open question that students can complete in class today, or over the next few days. 

  More about Triangular Numbers
  Intervention and Extension: More about Triangular Numbers
Loading resource...

Sequences as Functions (Part 1 of 2)

Unit 7: Functions
Lesson 10 of 11

Objective: SWBAT correctly identify the terms of sequences and graph sequences as functions.

Big Idea: Sequences can be thought of as functions with their own special qualities that are obvious on a graph.

  Print Lesson
Add this lesson to your favorites
Math, Graphing (Algebra), formulas, function, sequences
  55 minutes
image sequence 1
Similar Lessons
Graphing Linear Functions Using Given Information
Algebra I » Graphing Linear Functions
Big Idea: Students calculate slope and y-intercept before graphing a linear function on a coordinate plane.
Washington, DC
Environment: Urban
Noelani Davis
Choosing a Method to Find x-intercepts
Algebra I » Quadratics!
Big Idea: Students take a step back from their work to examine a variety of quadratic functions and reflect on why they might choose one method over another.
Boston, MA
Environment: Urban
Amanda Hathaway
Review and Work Periods
Algebra I » Functions and Modeling
Big Idea: Daily review openers are used to frame different ideas before students continue along their own paths.
Worcester, MA
Environment: Urban
James Dunseith
Something went wrong. See details for more info
Nothing to upload