Question

Ian gets $9.00 for each hour he works. He also gets $10.00 for each day he works. He made the equation y=9x+10x where x is the number of hours he works.

Explain why his equation will not tell him how much he makes in a day.

Answer 1

The equation y=9x+10x will only tell Ian how much he makes in terms of hours worked, but not how much he makes in a day because the equation only adds together the amount he earns per hour and the amount he earns per day, without accounting for the fact that the number of hours he works in a day can vary.