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Mobile Data: Build the Cost Models worksheet preview

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Mobile Data: Build the Cost Models

Students write proportional equations for mobile data costs, shared data, and plan comparisons using tables and pricing details.

Grade 7MathInteractive · Printable

Aligned to7.RP.A.2.c

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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, Circle the answer, Short answer

About this worksheet

What students practice

  • Students write equations that model proportional relationships between data use and cost.
  • Students represent the same proportional relationship with either quantity as the dependent variable.
  • Students use proportional equations to model savings between two data options.

How to use

Use after students can find unit rates. Have students label each variable and check that each coefficient has units that fit the equation.

Curriculum

Common Core standard covered

7.RP.A.2.c

Write equations for proportional relationships, such as total cost t = pn for n items at price p.

Preview

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Name Date

Mobile Data: Build the Cost Models

Write proportional equations to compare data options.

From Prices to Equations

All data amounts are measured in gigabytes (GB). Each option charges at a constant rate with no base fee, tax, or extra charge.

1.
The table shows the cost of the Flex data option. Let x be the data purchased in GB and p be the price in dollars. Which equation models every row?
Flex Data
Data, x (GB)Price, p ($)
27
517.5
828
  • A. p = x ÷ 3.5
  • B. p = 7x
  • C. p = x + 5
  • D. p = 3.5x
2.
The Lite option charges $2.80 per GB. Let x be GB purchased and p be the price in dollars. Complete the cost equation.

p =  x

3.
The Share option sells 6 GB for $15 at a constant price per GB. Let x be GB purchased and p be the price in dollars. Which equation models this option?
  • A. p = 2.5x
  • B. p = 15x
  • C. p = 0.4x
  • D. p = 6x

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