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7.RP.2a Day 1 Objective: I can determine if two quantities are proportional.

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Car A drives 60 miles in one hour, car B drives 120 miles in 2 hours, and car C drives 190 miles in 3 hours. Which car is going the fastest? Discuss with your group and be ready to explain your answer.

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Notes Pizza12345 Cost ($)$8 Constant ratios

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Notes Two quantities are proportional if they have a constant (same) ratios. Heartbeats 50 beats per minute What would be proportional to that?

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Notes Hours1234 Earnings ($)18365472 Constant ratios Are they proportional?

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Notes Hours1234 Earnings ($)18425681 Constant ratios Are they proportional?

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Notes Uptown tickets charges $7 per baseball game ticket plus a $3 processing per order. Is the cost of an order proportional to the number of tickets ordered?

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Notes Tickets ordered1234 Cost ($) Constant ratios

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Notes At the beginning of each year, Isabel had $120 in the bank. Each week, she deposits another $20. Is her account balance proportional to the number of weeks of deposits? Use the table below. Time (weeks)1234 Balance ($) Are the proportional?

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Notes Martin’s pages246 Time (minutes)51015 Constant ratios Jim’s pages347 Time minutes)51015 Constant ratios

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Notes Page 37 #4. Work together as a group to solve this problem. Be ready to share your answer with the class. **Plants and their heights, three comparison charts.

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