Math9-12+
Modeling Linear Growth and Decay Guided Notes
By Sharise B.
A guided-notes packet for 9th graders working through two linear scenarios from Activity 2, such as savings growth and value depreciation. Students name variables, build tables of values, and identify slope and y-intercept in each story before writing equations and graphing. It's designed to sit beside students during independent or partner work on equations and graphs.
Customize for your classroom
Teacher Guide & Tips
- Use this as a visual scaffold during Activity 2, keeping it on the desk while students write equations and sketch graphs, roughly 20-30 minutes of the lesson.
- Discussion question: In the savings scenario, what word in the story tells you the rate of change, and why does the starting value match the y-intercept?
- Scaffold for struggling readers: Have them highlight rate words like 'each' or 'per' in each scenario first, then fill in the variables and table before attempting the equation.
- Extension for advanced students: Ask them to compare the growth and decay scenarios, explaining how the sign of the slope changes the shape of each graph and what that means in context.
- Estimated time: about 25 minutes for a full pass through both scenarios with guided discussion.
Math9-12+
Modeling Linear Growth and Decay Guided Notes
By Sharise B.
A guided-notes packet for 9th graders working through two linear scenarios from Activity 2, such as savings growth and value depreciation. Students name variables, build tables of values, and identify slope and y-intercept in each story before writing equations and graphing. It's designed to sit beside students during independent or partner work on equations and graphs.
Customize for your classroom
Teacher Guide & Tips
- Use this as a visual scaffold during Activity 2, keeping it on the desk while students write equations and sketch graphs, roughly 20-30 minutes of the lesson.
- Discussion question: In the savings scenario, what word in the story tells you the rate of change, and why does the starting value match the y-intercept?
- Scaffold for struggling readers: Have them highlight rate words like 'each' or 'per' in each scenario first, then fill in the variables and table before attempting the equation.
- Extension for advanced students: Ask them to compare the growth and decay scenarios, explaining how the sign of the slope changes the shape of each graph and what that means in context.
- Estimated time: about 25 minutes for a full pass through both scenarios with guided discussion.