Polynomial function graphs illustrating intercepts and turning points.
Two graphs of polynomial functions on coordinate planes. The first graph shows a downward-opening parabola with x-intercepts at approximately x = -1 and x = 1, and a y-intercept at y = 1. The second graph shows a cubic function with x-intercepts at x = -3, x = -1, and x = 2, and a y-intercept at y = -4.