Digits, Grade 7, Volume 1, Homework Helper

8-2: TEKS Practice

  • 1. Find the initial value of the linear function y equals 3 x plus 5 .

  • 2. What linear function has initial value 2?

    • A. y equals 3 x plus 2

    • B. y equals minus 2 x en dash 3

    • C. y equals minus 3 x en dash 2

    • D. y equals 2 x plus 3

  • 3. Use the graph to answer the following questions.

    A coordinate graph of a line passing through (0, 6) and (7, 0).

    • a. Find the rate of change of the linear function.

    • b. Find the initial value of the linear function.

  • 4. The graph models the height h, in meters, of a hot air balloon, t minutes after beginning to descend. How high was the balloon when it began its descent?

    A coordinate graph of a linear relationship.

  • 5. Writing The linear function in the graph models the temperature T at t hours after noon on an autumn day.

    A coordinate graph of a linear relationship.

    • a. Find the initial value of the function.

    • b. What does this initial value represent?

      • A. The temperature at ten

      • B. The total change in temperature

      • C. The temperature at noon

      • D. The amount of time that passes

    • c. Sketch a graph with an initial value greater than the initial value in this graph.

    • d. Describe a situation that your graph could model. What can you conclude about the temperature in your graph?

  • 6. Think About the Process The linear function y equals 70 plus , 4 fifths , x models y, the height of an elevator in feet, after x seconds.

    • a. Which property lets you rewrite the equation in y equals m x plus b form?

    • b. What is the initial value of the function?

    • c. What does the initial value represent?


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Table of Contents

Digits, Grade 7, Volume 1, Homework Helper Unit A: Number and Operations Unit B: Expressions, Equations, and Relationships Unit C: Measurement and Geometry Unit D: Proportionality English/Spanish Glossary Formulas Math Symbols Formulas Measures Properties