Cell Phone Problem

Courtney is comparing Sprint to Verizon cell phone rates. Sprint charges $25.00 per month plus and .10 per minute for the use of the phone. Verizon charges $10.00 per month and .20 per minute for the use of the phone. Our goal is to find out how long Courtney would  have to use her phone to make Sprint the better choice.

Step 1 - Calculate for Verizon

1. Create a t-table

2. Create a graph

3. Write the rule

4. Explain the slope in a sentence.

5. Explain the y-intercept in a sentence.

Step 2 - Calculate for Sprint

1. Create a t-table

2. Create a graph

3. Write the rule

4. Explain the slope in a sentence.

5. Explain the y-intercept in a sentence.

Answer the question. Graph both rules on the same graph and answer "How long Courtney would have to use her phone to make Sprint the better choice. 

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