Antonio owns a small t-shirt printing company . The equation D=-34p+780 models the relationship between the demand (a number that will sell), D, in t-shirts, and the price of a t-shirt,p, in dollars. a) Find the demand if Antonio charges 7 dollars for a t-shirt. b) Find the demand if Antonio charges 12 dollars for a t-shirt. c) Use the information found in part a) and b) to graph the equation.

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