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Proportional Relationships I

Proportional Relationships I. Try It!. A herring swims 3 kilometers in 30 minutes. Another day, the herring swims 7 kilometers in 70 minutes. Is this a proportional relationship?. Talk About It. What does the x-axis represent? What does the y-axis represent? What is the scale on each axis?.

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Proportional Relationships I

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  1. Proportional Relationships I

  2. Try It! • A herring swims 3 kilometers in 30 minutes. Another day, the herring swims 7 kilometers in 70 minutes. Is this a proportional relationship?

  3. Talk About It • What does the x-axis represent? • What does the y-axis represent? • What is the scale on each axis?

  4. Talk About It • Two points always define a line. • Some lines represent proportional relationships and some do not. • A line that represents a proportional relationship goes through the origin.

  5. Talk About It • Does the line go through the origin?

  6. Solve It • Create a graph of the herring problem using the centimeter grid paper and a ruler. Show that the line goes through the origin.

  7. Check for Understanding • Which graph represents a proportional relationship?

  8. Practice and Homework • Start on Lesson 1 Ratios and Proportional Relationships worksheet. Read the directions carefully. • Homework: Complete worksheet and look at the web page for additional problems for practice.

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