Math Practice 101
Homework Explained - Math Practice 101

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Grade 7 HMH Go Math - Answer Keys
Chapter 4: Rates and Proportionality; Lesson 3: Proportional Relationships and Graphs


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For Exercises 8–12, the graph shows the relationship between time and distance run by two horses.

  • Question 8 (request help)

    Explain the meaning of the point (0,0).
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  • Question 9 (request help)

    How long does it take each horse to run a mile?
  • Horse A runs 1 mile in     minutes
    Horse B runs 1 mile in     minutes
  • Question 10 (request help)

    Multiple Representations

    Write an equation for the relationship between time and distance for each horse.
  • For Horse A : y =     x
    For Horse B : y =     x
  • Question 11 (request help)

    Draw Conclusions

    At the given rates, how far would each horse run in 12 minutes?
  • Horse A will run     miles
    Horse B will run     miles
  • Question 12 (request help)

    Analyze Relationships

    Draw a line on the graph representing a horse than runs faster than horses A and B.
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  • Question 13 (request help)

    A bullet train can travel at 170 miles per hour. Will a graph representing distance in miles compared to time in hours show a proportional relationship? Explain.
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  • Question 14 (request help)

    Critical Thinking

    When would it be more useful to represent a proportional relationship with a graph rather than an equation?
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  • Question 15 (request help)

    Multiple Representations

    Bargain DVDs cost $5 each at Mega Movie.

    a. Graph the proportional relationship that gives the cost y in dollars of buying x bargain DVDs.

     
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  • Question 15 (request help)

    b. Give an ordered pair on the graph and explain its meaning in the real world context.
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