2-7: TEKS Practice

  • 1. The amount of time Gareth spends studying and his test scores have a proportional relationship. Complete the table.

  • 2. Think About the Process The temperature 100 ft below sea level is 33°F. The temperature at sea level is 53°F. The temperature drops 2°F every 1,000 ft above sea level. Let x be the distance above sea level in thousands of feet. Let y be the temperature.

    • a. Express the relationship between x and y with an equation.

    • b. Is the relationship between x and y proportional?

    • c. The temperature 5,000 ft above sea level is °F.

    • d. What given information did you not use to solve this problem?

      • A. The rate of change of the temperature

      • B. The temperature at sea level

      • C. The temperature 100 ft below sea level

  • 3. The table shows a proportional relationship between x and y. Complete the table. Simplify your answers.

  • 4. Suppose you are waiting in a line. The time it takes for you to reach the front depends on the number of people ahead of you. This is shown in the table. Does the table show a proportional relationship?

  • 5. Think About the Process The number of songs on a CD and the length of the CD have a ­proportional relationship.

    • a. Which operation should you use to find the ratios?

      • A. Multiplication

      • B. Subtraction

      • C. Division

      • D. Addition

    For parts (b) through (d), complete the table.

  • 6. Megan's father is preparing y gift bags for guests at Megan's graduation party. Her father buys 5 more gift bags than the number of guests x.

    • a. Express the relationship with an equation.

      y =

    • b. Is the relationship between x and y proportional?


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Table of Contents

Digits, Grade 8, Volume 1, Homework Helper Unit A: Number and Operations Unit B: Proportionality Unit C: Expressions, Equations, and Relationships English/Spanish Glossary Formulas Math Symbols Formulas Measures Properties