Question

You spend $60 a month on transportation and are making a choice between bus tickets or train rides. There are 20 working days in the month, and the more you spend on train tickets, the more you will walk. Bus rides cost $3 and train tickets cost $4. Plot a budget constraint line that admits no “partial” tickets.

Answer 1

the figure above shows the budget constraint.

Bus ticket cost $3 per day

Train ticket cost $4 per day

Total working days 20

Hence, if u travel all 20 days by bus, total transportation cost would be 3*20 = $60

And if you choose to travel by train for all 20 days, total transportation cost would be 4*20=$80

Thus by joining both the points you obtain the budget constraint

All the points on the budget constraint, are the various options available to you for making the choices in both, bus and train and admits no partial tickets.

And total transportation cost would be in between 60 to 80 per month.

Though if we keep the budget to $60, then all days you have to travel by bus as this is the minimnum cost and even a single day by train would exceed the budget.