Situation 1: For every mile on the treadmill, you burn x^8 calories. linear or non- linear
Situation 2: In the store, you pay 4 dollars for every notebook.linear or non- linear
Situation 1: Non-linear. The relationship between the number of miles on the treadmill and calories burned is exponential, as the calories burned increase exponentially with the number of miles.
Situation 2: Linear. The relationship between the number of notebooks and the cost is linear, as the cost increases linearly with the number of notebooks.