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National Parks Road Trip: Find the Constant worksheet preview

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National Parks Road Trip: Find the Constant

Find constants of proportionality in national park road-trip plans using tables, graphs, equations, diagrams, and descriptions.

Grade 7MathInteractive · Printable

Aligned to7.RP.A.2.b

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What’s included

  • Single worksheet
  • Auto-graded online
  • 1 Common Core standard
  • Printable answer key
  • 14 questions
  • Classroom-ready

Details

Format
Interactive · Printable
Grade
Grade 7
Subject
Math
Question types
Fill in the blank, Multiple choice, Matching, Short answer

About this worksheet

What students practice

  • Students identify constants of proportionality from tables, graphs, equations, diagrams, and descriptions.
  • Students interpret the constant in y = kx using the order and units of the quantities.
  • Students justify a constant of proportionality using a nonzero pair of values.

How to use

Use after introducing y = kx. Have students label each constant with its units and show the division they used before discussing the final explanation.

Curriculum

Common Core standard covered

7.RP.A.2.b

Find the constant of proportionality in tables, graphs, equations, diagrams, and word descriptions.

Preview

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Name Date

National Parks Road Trip: Find the Constant

Read trip plans in tables, graphs, equations, and diagrams.

Trip Planning

Each situation models a proportional relationship. Find k in y = kx. Pay attention to which quantity is x and which is y.

1.
Amira's family is planning a drive toward a national park. The table models their distance at a constant speed.
Driving Estimate
Time, x (hours)Distance, y (miles)
1.581
3162
4.5243

What is k?   miles per hour

2.
Before entering the park, the group buys identical snack packs. There is no additional fee.
Snack Purchase
Packs, xCost, y (dollars)
47
814
1221

What is the constant of proportionality for cost in dollars per pack?   dollars per pack

3.
On the road-trip map, 3 centimeters represents 21 miles. Let x be map distance in centimeters and y be actual distance in miles.

What is k in y = kx?   miles per centimeter

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