Math: Handphone Plans

Today in Math we were asked to solve some handphone problems.

• Plan A costs a basic fee of $29.95 per month and 10 cents per text message
• Plan B costs a basic fee of $90.20 per month and has unlimited text messages 
• Plan C costs a basic fee of $49.95 per month and 5 cents per text message
• All plans offer unlimited calling 
• Calling on nights and weekends are free 
• Long distance calls are included

Question 1: Find the cost of each plan assuming you text 500 texts in a month (show your working out)

Answer: 

Plan A: 29.95 (basic fee) + 0.1x500 (cost for 500 texts, I converted cents into dollars) = 79.95 dollars

Plan B: 90.20 (basic fee) + 0 (unlimited text messages) = 90.20 dollars

Plan C: 49.95 (basic fee) + 0.05x500 (cost for 500 texts, I converted cents into dollars) = 74.95 dollars

Question 2: Make a visual displaying the plans so they are easy to compare with

Answer:

Red = Plan A

Blue = Plan B

Green= Plan C

Question 3: Which plans are a better buy at which number of texts sent?

Answer: 

For anything number of texts sent below 1200, Plan C will be a better deal.

For anything number of texts sent equal to 1200, both Plan C and Plan A will be the best deals.

For anything number of texts sent above 1200, Plan B will be a better deal.