Digits, Grade 8, Volume 1, Homework Helper

2-1: TEKS Practice

  • 1. An airline company rewards the customers who fly often with a frequent flyer program. The airline will give their customers 450 points for every 3 flights that they take. Draw a graph which models this situation.

  • 2. A class is having a bake sale. The class earns 15 cents for each cookie sold.

    • a. Draw a graph which models this situation.

    • b. How many cookies does the class need to sell to earn 45 cents?

  • 3. Think About the Process A dry cleaning company charges $13 to clean and press 2 jackets.

    • a. Draw a graph of the relation.

    • b. How can you find the cost to clean and press 4 jackets using a graph?

      • A. Locate 4 on the y-axis then move to the right to find the corresponding x-value.

      • B. Locate 4 on the x-axis then move down to find the corresponding y-value.

      • C. Locate 4 on the x-axis then move up to find the corresponding y-value.

      • D. Locate 4 on the y-axis then move to the left to find the corresponding x-value.

    • c. Find the cost to clean and press 4 jackets.

  • 4. A clothing store has an 45% sales tax on all items purchased.

    • a. Draw a graph which models this situation.

    • b. Is the amount of taxes proportional to the purchase?

  • 5. A salesperson earns a commission that is a percent of the sales. The graph shows the proportional relationship between sales and commission. What percent commission does the salesperson earn?

    A graph.

  • 6. A submarine dives at 140 feet per minute. Draw a graph which models this situation. Start when the submarine is at sea level (0 feet).

  • 7. A 10-inch candle burns at a rate of 2 inch per hour.

    • a. Draw a graph which models this situation.

    • b. How long will the candle last?

  • 8. Error Analysis A tree grows 15 inches each year. Angela is asked to find when the tree will be 3 , and 3 fourths feet tall. Angela incorrectly says 45 years.

    • a. Draw a graph which models the situation.

    • b. How many years will it take for the tree to be 3 , and 3 fourths feet tall?

    • c. Which mistake might Angela have made?

      • A. Angela did not convert the height of the tree correctly.

      • B. Angela gave the height of the tree in inches not the number of years.

      • C. Angela gave the height of the tree in feet not the number of years.

      • D. Angela drew a graph with a negative relationship instead of a positive relationship.


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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