Given the equation y = 3x + 4, what is the function of the coefficient of 3 ? A) It moves the graph of y = 3x2 + 4 three units higher than the graph of y = x2 + 4. B) It moves the graph of y = 3x2 + 4 three units lower than the graph of y = x2 + 4. C) It makes the graph of y = 3x3 + 4 wider than the graph of y = x2 + 4. D) It makes the graph of y = 3x2 + 4 narrower than the graph of y = x2 + 4