Learning Target: increasing, decreasing or constant intervals of Functions for Key Features of Functions High School AlgebraThis lesson starts with a picture warm up to get students thinking about direction. Increasing, Decreasing and Constant sections of the graph are introduced, a review of inter...
Provided with graphs, students identify where the functions are constant, decreasing or increasing. Examples include graphs of all functions except trigonometric functions.

On What Interval Is The Function Increasing
This document is a "How to Guide" that offers step by step instructions on how to identify increasing and decreasing intervals of polynomial functions. It uses a quadratic example to get students started with the concept of a turning point, what that actually means, and how intervals relate to the domain, x-axis, and a visual of the number line. This is a great reference for your algebra one, algebra two, and even pre-calc classes!
Make analyzing functions more visual with this engaging Algebra 2 highlighting activity! Students use color to identify intervals where functions are increasing, decreasing, positive, and negative while practicing graph analysis and interval notation. Perfect for stations, partner work, guided practice, review, or a hands-on alternative to a traditional worksheet. A ready-to-use activity that helps students see and understand key features of functions.


Open Intervals Function Increasing
Increasing and Decreasing Intervals of Functions is a Key Feature that is studied in algebra, precalculus and calculus. Read more in this blog post.


This two page graphing piecewise functions notes sheet is a clear, structured resource that helps students master one of the more challenging Algebra topics. It guides students step-by-step through interpreting, evaluating, and graphing piecewise functions with a strong focus on clarity and visual organization. Practice problems go beyond graphing and include identifying domain and range, as well as analyzing increasing/decreasing intervals and continuity—helping students build a deeper understanding of function behavior, not just procedures. The layout reduces confusion by breaking concepts into manageable steps, making it ideal for guided notes, direct instruction, or review. For teachers, it’s a ready-to-use resource that saves prep time and supports consistent instruction.
On Which Interval Is The Function Increasing
Music worksheet for learning the intervals unison, 2nd, and 3rd.
A fun foldable to teach or review finding intervals on which a function increases, decreases, or is constant.










Increasing/Decreasing & Positive/Negative Intervals Worksheet | Domain & Range Practice Help your students master one of the most misunderstood concepts in Algebraintervals of increase/decrease and positive/negative valueswith this focused, student-friendly worksheet!This resource includes 6 carefully designed questions that build confidence and clarity, starting with graph interpretation and ending with graph creation from key function attributes. Ideal for Algebra 1, Algebra 2, or Pre-Calculus students who need structured support and visual reasoning practice. Whats Covered: Increasing and decreasing intervals Positive and negative intervals Domain and range from graphs Graph creation from written descriptions Whats Included: 4 questions with graphs students ident
How to Find the Absolute Extrema of a Function on a Closed Interval usin...
Algebra 2 students get to mix and match function cards (absolute value, radical and quadratic) with characteristic cards (range interval, increasing interval or decreasing interval) and then either graph or write the equation of the mix-match (based on the card's directions). There are 162 combinations! Each student in the group should complete each mix-match so that they can check each other.