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Lesson Menu Main Idea Example 1:Use Unit Rates Example 2:Use Unit Rates Example 3:Use Unit Rates Example 4:Use Equivalent Fractions Example 5:Use Equivalent Fractions

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Main Idea/Vocabulary Determine if two ratios are equivalent.

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Example 1 Use Unit Rates Determine if 20 rolls for $5 and 48 rolls for $12 are equivalent rates. Explain your reasoning. Write each rate as a fraction. Then find its unit rate. = 20 rolls $5 __________ 4 rolls $1 _________ = __________ 48 rolls $12 4 rolls $1 _________ Answer:Since the rates have the same unit rate,, they are equivalent. 4 rolls $1 _______ ÷5 ÷12

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Example 1 CYP A.Yes; they have the same unit rate,. B.Yes; they have the same unit rate,. C.Yes; they have the same unit rate,. D.No; they do not have the same unit rate. Determine if $24 for 4 hours and $30 for 6 hours are equivalent rates. Explain your reasoning.

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Example 2 Determine if 42 people on 7 teams and 64 people on 8 teams are equivalent rates. Explain your reasoning. Write each rate as a fraction. Then find its unit rate. Use Unit Rates = ____________ 42 people 7 teams ___________ 6 people 1 team = ____________ 64 people 8 teams ___________ 8 people 1 team Answer: Since the rates do not have the same unit rate, they are not equivalent. ÷7 ÷8 ÷7 ÷8

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Example 2 CYP Determine if 90 miles in 2 hours and 135 miles in 3 hours are equivalent rates. Explain your reasoning. A.Yes; they have the same unit rate, B.Yes; they have the same unit rate, C.Yes; they have the same unit rate, D.No; they do not have the same unit rate.

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Example 3 FOOD You can buy 3 medium pizzas at The Pizza Place for $18 or 5 medium pizzas for $30. Are these selling rates equivalent? Explain your reasoning. Write each rate as a fraction. Then find its unit rate. Use Unit Rates = __________ $18 3 pizzas _________ $6 1 pizza = __________ $30 5 pizzas _________ $6 1 pizza ÷3 ÷5

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Example 3 Use Unit Rates Answer:Since the unit rates are the same,, the rates are equivalent. _______ $6 1 pizza

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Example 3 CYP CARWASHING On Saturday, the tennis team washed 42 cars in 3 hours to raise money for the team. On Sunday, they washed 60 cars in 5 hours. Are these work rates equivalent? Explain your reasoning. A.Yes; since the unit rates are the same, the rates are equivalent. B.Yes; since the unit rates are the same, the rates are equivalent. C.Yes; since the unit rates are the same, the rates are equivalent. D.No; since the unit rates are not the same, the rates are not equivalent.

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Example 4 Determine if 5 laps swum in 8 minutes and 11 laps swum in 16 minutes are equivalent rates. Explain your reasoning. Write each rate as a fraction. The numerator and the denominator are not multiplied by the same number. So, the fractions are not equivalent. Use Equivalent Fractions = ____________ 5 laps 8 minutes ___________ 11 laps 16 minutes ? ×2 ×2.2

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Example 4 Answer: Since the fractions are not equivalent, the rates are not equivalent. Use Equivalent Fractions

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Example 4 CYP A.No; since is not a unit rate, the ratios are not equivalent. B.Yes; since the ratios are equivalent. C.Yes; since the fractions are equivalent. D.No; since the fractions are not equivalent, the ratios are not equivalent. Determine if 4 free throws made out of 6 attempts and 8 free throws made out of 12 attempts are equivalent ratios.

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Example 5 Use Equivalent Fractions Determine if 8 corrals with 56 horses and 4 corrals with 28 horses are equivalent ratios. Explain your reasoning. Write each ratio as a fraction. = ____________ 8 corrals 56 horses ___________ 4 corrals 28 horses ? ÷2

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Example 5 Use Equivalent Fractions Answer:Since the fractions are equivalent, the ratios are equivalent. The numerator and the denominator are divided by the same number. So, the fractions are equivalent.

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Example 5 CYP A.Yes; since the ratios are equivalent. B.Yes; since the fractions are equivalent. C.No; since is not a unit rate, the ratios are not equivalent. D.No; since the ratios are not equivalent. Determine if 15 boys out of 36 students and 5 boys out of 9 students are equivalent ratios.

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