Students will solve a real world math problem by helping a store owner purchase t-shirts for the best price. Students will have to discover the constant (k) (price of 1 shirt) when given equivalent ratios of cost to quantity sale prices. Students will also have to create proportional equations that represent the cost of each t-shirts. Furthermore, students will have to find the constant from a graph, and input values into a table of values that represents the price of t-shirts for different quantities. Lastly, students will have to explain the strategies they took to solve several of the problems.
This task can be used as an activity and/or assessment. It is great for formal or informal observations.