In the morning, Marco sold 12 cups of lemonade for $3. By the end of the day, he had earned $9. How many cups of lemonade did he sell in all?

STEP BY STEP ANSWER don't use me for points
Kaycee wrote the proportion 12/3= 9/c Identify the error and give two ways to write the proportion correctly.

Sample response: Kaycee did not keep lemonade and dollars in corresponding positions in the ratios of the proportion. The proportion should be 12/3=c/9 or it could be written 3/12=9/c. Dollars should be in the same position and cups should be in the same position across ratios.

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In the morning, Marco sold 12 cups of lemonade for $3. By the end of the day, he had earned $9. How many cups of lemonade did he sell in all? STEP BY STEP ANSWER don't use me for points Kaycee wrote the proportion 12/3= 9/c Identify the error and give two ways to write the proportion correctly.

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In the morning, Marco sold 12 cups of lemonade for $3. By the end of the day, he had earned $9. How many cups of lemonade did he sell in all?

STEP BY STEP ANSWER don't use me for points
Kaycee wrote the proportion 12/3= 9/c Identify the error and give two ways to write the proportion correctly.