An individual allocates his time between the study of sociology and economics. She can read 30 pages of sociology per hour. In economics, it can read 5 pages per hour. She only has 10 hours in total to study the two subjects. She decided that she would read at least 30 pages economy. Plot its entire budget (with the economy pages on the horizontal axis, and the sociology pages on the vertical axis), and hatch the area where his choice will be.