def add_graph_and_area(self):
    graph = self.get_graph((lambda x: (((((- 0.02) * (x + 1)) * (x - 3)) * (x - 7)) * (x - 10))), x_min=0, x_max=8, color=VELOCITY_COLOR)
    area = self.get_riemann_rectangles(graph, x_min=0, x_max=8, dx=self.small_dx, start_color=BLUE_D, end_color=BLUE_D, fill_opacity=0.75, stroke_width=0)
    self.play(ShowCreation(graph), FadeIn(area, run_time=2, lag_ratio=0.5))
    self.graph = graph
    self.area = area
def add_graph_and_area(self):
    graph = self.get_graph((lambda x: (((((- 0.02) * (x + 1)) * (x - 3)) * (x - 7)) * (x - 10))), x_min=0, x_max=8, color=VELOCITY_COLOR)
    area = self.get_riemann_rectangles(graph, x_min=0, x_max=8, dx=self.small_dx, start_color=BLUE_D, end_color=BLUE_D, fill_opacity=0.75, stroke_width=0)
    self.play(ShowCreation(graph), FadeIn(area, run_time=2, lag_ratio=0.5))
    self.graph = graph
    self.area = area