def create_chart(temperatures: List[float], extra_point_temperatures: List[float]=None) -> ScatterChart:
chart = ScatterChart()
chart.scatterStyle = "smoothMarker"
temperatures_copy = [t for t in temperatures]
if extra_point_temperatures is not None:
for extra in extra_point_temperatures:
for temperature in temperatures:
if math.isclose(extra, temperature, abs_tol=0.5):
temperatures_copy.remove(temperature)
chart.x_axis.scaling.min = round(temperatures_copy[0], 1) - 1
chart.x_axis.scaling.max = round(temperatures_copy[-1], 1) + 1
return chart
