Question

Two brothers andile and beki want to join a gym for one year. Andile decides to join gym aerolux and beki decides to join gym bodyworx. The monthly fee for aerolux is R125 with no registration gee and monthly fee for bodyworks is 100 with R250 registration fee.

Decides which one is input variable and output variables

Answer 1

The two brothers, Andile and Beki want to join gym for some months and hence they have to determine how much they will pay for it.

Therefore the input variable i.e. the independent variable x will be the number of months that they will be gymming. The output variable i.e. the dependent variable will be the amount of money they will have to pay for the duration. This can be represented as shown below:

Andile for Aerolux gym; y = 125x where 0 ≤ x ≤ 12

Beki for Bodyworx gym; y = 250 + 100x where 0 ≤ x ≤ 12