Systems of Linear Equations in Real Life and their Solutions. Cell phone plans, cab rides as real world systems of equations

Worksheet on this webpage

Systems of Linear Equations Worksheets

What is a System?

Interactive System of Linear Equations

Problem 1

At how many minutes do both companies charge the same amount?

20 Minutes

Problem 2

At how many minutes do both companies charge the same amount?

10 Minutes

Problem 3

At how many minutes do both companies charge the same amount?

Never, the slope of the graphs of their rates is the same. Parallel lines never intersect.

A Real World Dilemma!

Use your knowledge of solutions of systems of linear equations to solve a real world problem you might have already been faced with: Choosing the best cell phone plan

Step 1

At how many minutes do both companies charge the same amount?

20 minutes

Step 2

When is Company T a better Value?

T is a better value from 0 to 20 minutes.

Step 3

When is Company S a better Value?

S is a better value if you talk more than 20 minutes

Step 4

The pink region represents the cheaper segment of the chart.

Real World Horror story

A well known real world math incident that almost cost a Verizon customer a large amount of money (Hint: there's a difference between .02 cents and .02 dollars!)