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### 3.4 Direct Variation

Standard(s):

• F.LE.A.1: Distinguish between situations that can be modeled with linear functions and with exponential functions.
• F.LE.A.1.A: Prove that linear functions grow by equal differences over equal intervals, and that exponential functions grow by equal factors over equal intervals.
• F.LE.A.1.B: Recognize situations in which one quantity changes at a constant rate per unit interval relative to another.

Essential Question:

• When does a function best model a situation?

Learning Target:

• I can define a direct variation equation. (Knowledge)
• I can identify a direct variation from an equation or a graph. (Comprehension)
• I can graph a direct variation equation. (Synthesize)
• I can write an equation for a proportional relationship. (Synthesize)
• I can write an equation for a non-proportional linear relationship. (Synthesize)

Warm-Up:

Notes:

Click on the image below for the PDF of the notes 3.4 Direct Variation

Video:

Click below for the Classroom Lesson - 3.4 Direct Variation

Watch this video on Direct Variation

Watch this video on Direct Variation

Activities:

Click on the image below for an activity - Direct Variation Practice with Geogebra.
Click on the image below for an activity - IXL Practice

Extra Help:
Click on the image below for help

Assessment/Homework:
pg. 183 10-32 even