Aqua Regia is an acid that can dissolve gold. It is made by mixing hydrochloric acid and nitric acid in the ratio 3 to 1 (by volume). Let X be an unspecified number of liters of hydrochloric acid, which can vary, let Y be the corresponding number of liters of nitric acid needed to make Aqua Regia.
a. Sketch a graph in a coordinate plane to show the relationship between X and Y.
b. Reason about quantities and use math drawings to find and explain at least two equations that relate X and Y.
c. Discuss how to interpret the values of the ratio
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