Question

Tran has made a plan to help him study for his math exam.
He has broken down the material that he has to study into two parts: part A and part B and has, at most, 2 hours
every evening over the next week to study.
He wants to spend at least twice as much time studying for part A as for part B.
Show graphically all the possible combinations of time that Tran can study for each part.

Answer 1

draw a bar graph, with the bars of height 2 or less for each night
shade in each bar with 2 colors for a and b, making sure that b is no more than 1/3 of the full height. Then shade in the "a" part, which must be at least twice as tall as the "b" part.

Answer 2

Great !