Answer:
C) The variable Y could be the price of the wool used to make mittens.
D) The variable X could be consumers income.
Explanation:
quantity supplied = 50 + 1/2X - 5Y -24Z
In this equation if X increases, then the quantity supplied increases. Therefore X can either be the product's price or consumer income.
In this equation if Y or Z increase, then the quantity supplied decreases. Therefore Y or Z are production costs, either labor or materials.