In this activity students will determine the amount that must be collected in tips in order for the waitress and the cook to make an equal amount of money in a day. Students will fill values into a spreadsheet and create a scatterplot of the data. Then they will run a linear regression on the data and solve the resulting linear system.
Before the Activity
Download the student file Waitress and CookS and send to Nspire calculators.
The teacher may want to download the teacher file Waitress and CookT.TNS
During the Activity
This activity may be teacher led or students may work in groups of two.
After the Activity
Discuss student answers.