18. Your friend Erlie ask your help in drawing a rough sketch of the graph of y= -(x² - 1)(2x²-3) by means of leading coefficient test. How will you explain the behavior of the graph ? A. The graph is falling to the left and rising to the right. B. The graph is rising to both left and right. C. The graph is rising to the left and falling to the right. D. The graph is falling to both left and right.
