Context is the key to understanding slope. A real-world application of slope uses a weight loss scenario with a constant rate of change to introduce the concept of slope of a line, before it makes a connection to the ordered pairs and the slope formula. 

Concepts

slope, slope formula, rate of change, real-world applications, linear functions

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Additional Tags

math

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Instructional Ideas

• Use to introduce the concept of slope and using the slope formula
• Allow pupils to use a graphing calculator to explore the relationships more efficiently

Classroom Considerations

• The topic of weight loss may be a sensitive topic for some learners, particularly in middle school
• Can be used with a variety of reading levels and varying levels of guidance

Pros

• Incorporates a real-world example to improve understanding
• Provides handout with key and a detailed teacher guide

Cons

• Does not provide coordinate plane for questions that require graphing

Common Core

8.F.B.4 8.F.B.5 HSA-CED.A.2 HSF-IF.B.4 HSF-IF.B.6 MP6 MP8