MBF 3C Unit 4 – Quadratic Relations IP a g e | 1Lesson 2 The Quadratic Relation y = ax2+ k Investigate Graphs of y = ax2+ k Pp. 180 – 182 Graph the following relationships: y = 4x2y = 0.5x2y = -2x2The Effect of Changing “a” The value of a determines the orientation and shape of the parabola relative to the graph of y =x2. If a > 0, the parabola opens upward. If a < 0, the parabola opens downward. If - 1 < a < 1, the parabola is vertically compressed relative to the graph of y =x2. If a <- 1 or a > 1, the parabola is vertically stretched relative to the graph of y =x2.