We will investigate how to use linear relations to determine the amount of earnings made from babysitting service.
The earnings ( y ) are expressed as a function of babysitting hours ( x ) as a linear function as follows:

a) We will use the above given linear model to determine the amount of money earned if one babysits for 4 hours.
We will declare the given variable:

The function variable ( y ) i.e the amount of earnings can be determined from the given linear equation:

The amount of money earned against 4 hours of babysitting is:

b) We will determine the number of hours off babysitting calendered for the month given that we have $210 in our bank.
We will declare the given variable:

The function variable ( y ) i.e the amount of earnings can be determined from the given linear equation:

The amount of hours accumulated for babysitting in this month is:
