Comparing Cell Phone Plans

This lesson teaches how to compare two cell phone plans by analyzing their linear relations. It covers understanding slope and y-intercept, identifying key words indicating slope, and analyzing graphs to determine which plan is more cost-effective at different points. The lesson concludes with a summary of how to use these concepts to make informed decisions.

What are the two main components used to compare cell phone plans in this lesson?

• Slope and y-intercept

• Price and quality

• Brand and popularity

• Data and minutes

Which words indicate the slope in a verbal description of a linear relation?

• High and low

• Per and each

• Fast and slow

• Total and sum

What is a common mistake when describing a graph?

• Using terms like increasing and decreasing

• Saying one function is higher without specifics

• Identifying the slope correctly

• Highlighting the y-intercept

In the analysis of cell phone plans, which plan starts with a higher initial cost?

• Orange plan

• Blue plan

• Both plans start the same

• Neither plan has an initial cost

Which plan has a steeper slope, indicating a higher cost per call?

• Neither plan has a slope

• Orange plan

• Blue plan

• Both plans have the same slope

For how many calls is the orange plan less expensive?

• More than 50 calls

• 25 to 50 calls

• 0 to 24 calls

• 0 to 10 calls

At what point do both plans cost the same?

• 30 calls

• 10 calls

• 20 calls

• 25 calls

Which plan becomes less expensive after 25 calls?

• Both plans remain the same

• Blue plan

• Neither plan becomes less expensive

• Orange plan

What is the significance of the y-intercept in comparing the plans?

• It determines the slope

• It represents the number of calls

• It shows the total cost

• It indicates the initial cost

What have you learned about comparing linear relations in this lesson?

• How to find the fastest plan

• How to choose the best brand

• How to compare using slope and y-intercept

• How to calculate total cost