## Reflection: Writing Across the Disciplines Comparing Graphs of Linear Functions Using Dynamic Algebra - Section 1: Launch

I was very surprised in this activity by students reluctance to get started.  I anticipated that they would have a lot to say about slope and y-intercept but they were having trouble putting pen to paper.  In an "on the fly" adjustment.  I asked students to write the words slope and y-intercept on their paper along with the words positive and negative.  Then I had them do a turn and talk with their parter to discuss anything they could remember about the connection with these terms.  Once students got their ideas out verbally, the writing came more easily.  Most students showed diagrams of positive and negative slopes.  Some students showed the y-intercept as well and gave an example of an equation.  In the end, this ended up being a nice way to get student's brains ready for what they would be investigating that day.

Activating Prior Knowledge
Writing Across the Disciplines: Activating Prior Knowledge

# Comparing Graphs of Linear Functions Using Dynamic Algebra

Unit 2: Linear Functions
Lesson 14 of 19

## Big Idea: This lesson uses interactive technology to let students experiment with changing the parameters in a linear function.

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Standards:
Subject(s):
Math, Algebra, linear functions, Graphing (Algebra), rate of change, y-intercept, slopes, dynamic algebra, desmos
40 minutes

### James Bialasik

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