Compare Same Format Linear Functions

The cost of Nate’s service is described by y = 4x + 6. The table shows the cost of Beth’s service. Find the equation for Beth's service. Which service is cheaper for 8 movies in one month?

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Compare the rates of change. Do they have the same rate of change? If they have different rates of change, which one is greater?

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What is the rate of change for each function, and which one has the greater rate of change?

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What is the rate of change for each? Who has the greater rate of change?

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• A

• B

• C

• D

• Function J, -6

• Function J, 8

• Function K, 5

• Function K, 10

Sam is saving more money per week than his sister.

• TRUE

• FALSE

Which statement is true?

• A

• B

• C

• D

The cost of Patrick’s texting is described by y = 0.03x + 5. The cost of Melanie’s texting is shown in the table. Which service is cheaper when 50 texts are sent or received in one month? 

• Patrick’s service would cost $4.50. Melanie’s would cost $10.50. Patrick’s is cheaper.

• Patrick’s service would cost $6.50. Melanie’s would cost $12.50. Patrick’s is cheaper.

• Patrick’s service would cost $16.50. Melanie’s would cost $12.50. Melanie's is cheaper.

• Patrick’s service would cost $12.50. Melanie’s would cost $6.50. Melanie's is cheaper.

The cost of Nate’s service is described by y = 4x + 6. The table shows the cost of Beth’s service. Find the equation for Beth's service.  Which service is cheaper for 8 movies in one month?

• Beth's service

  ($38 vs. $40) is cheaper

• Nate’s service

  ($42 vs. $44) is cheaper

• Nate’s service

  ($38 vs. $40) is cheaper

• Beth's service

  ($42 vs. $44) is cheaper