How does changing the range affect the a equation

Lucy is a dress maker. she sews \dfrac47 7 4 of a dress in \dfrac34 4 3 hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable

Construct the graph that models the given situation

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2