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Proportions and Measurement SystemsPowerPoint Presentation

Proportions and Measurement Systems

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Proportions and Measurement Systems

Review the English measurement system and the metric system

Convert measurement units using conversion factors

Convert measurement units using dimensional analysis

Learn and use the term rate

• Place the measurement for ounces in L1 and the corresponding measurement for grams in L2.

• Create a list L3 that represents the quotient of L2/L1. Write a ratio for g/oz.

• Write a sentence that explains the meaning of the ratio you wrote in the last question.

• Use your ratio to find the equivalents for the Tomatoes and the Sundried Tomatoes.

• If x ounces corresponds to y grams, write a proportion that can be used to solve for either the ounces or grams.

• Solve the previous proportion for x ounces.

• Solve the previous proportion for y grams.

Direct Variation that can be used to solve for either the ounces or grams.

Learn the properties of a direct variation equation

Graph a direct variation equation

Read a direct variation graph to find missing values in the corresponding table

Use a direct variation equation to extrapolate values from a given data set

Develop an intuitive understand of the concepts of slope and linear equation

- Place the measurement for ounces in L1 and the corresponding measurement for grams in L2.
- Create a scatter plot of the data in L1 (x axis) and L2 (y axis). Set an appropriate window.
- Describe any patterns you see in your graph.

- Trace along the graph and describe how the x and y values are related.
- Create a list L3 that represents the quotient of L2/L1. What does this number mean?
- Return to the graph and trace along the graph. How does the number you saw in L3 related to the value in each ordered pair?

- Return to the lists and describe how you can create the value in L2 from the value in L1. How can you create the value in L1 from the value in L2?
- If x is the number of ounces, then describe how you can find the corresponding number of grams (y). y=_______________
- Enter this equation in y1 in your graphing calculator. What happens when this line is graphed against the data?

- Trace along the graph of your equation. Predict the number of grams in the can of tomatoes that weighs 102 oz. Predict the number of ounces in the can of sundried tomatoes that weights 980 grams.
- Create a table of values for x and y. Predict the number of grams in the can of tomatoes that weighs 102 oz. Predict the number of ounces in the can of sundried tomatoes that weights 980 grams.

- Write several sentences that describes what you learned about approximating values with a graph, a table, and a graph of an equation. Describe which way you prefer and describe why.

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