Grade 7 | Unit 2 | Lesson 9: Solving Problems about Proportional Relationships | Practice Problems

For each situation, explain whether you think the relationship is proportional or not. Explain your reasoning. The weight of a stack of standard 8.5x11 copier paper vs. number of sheets of paper.

• Proportional

• Not Proportional

For each situation, explain whether you think the relationship is proportional or not. Explain your reasoning. The weight of a stack of different-sized books vs. the number of books in the stack.

• Proportional

• Not Proportional

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Find their ages in different years by filling in the table. Lin and her brother were born on the same date in different years. Lin was 5 years old when her brother was 2. Is there a proportional relationship between Lin’s age and her brother’s age? Explain your reasoning.

Lin's age	Her brother's age
5	2
6
15
25

• Proportional

• Not Proportional

• Agree

• Disagree

Quadrilateral A has side lengths 3, 4, 5, and 6. Quadrilateral B is a scaled copy of Quadrilateral A with a scale factor of 2. Select all of the following that are side lengths of Quadrilateral B.

• 5

• 6

• 7

• 8

• 9