Problem 3. An OSU senior is studying for exams in psychology and economics. The student has time to read 40 pages of psychology and 30 pages of economics. Or, in the

same time the student could read 30 pages of psychology and 60 pages of economics. (Hint: The coordinates of two points are sufficient to get an equation of a line). a) How many pages of economics could the student read if she spent all her time on reading economics and none on psychology? b) How many pages of psychology could the student read if she spent all her time on reading psychology and none on economics?