Insert the correct syntax for specifying that the plot should be of type 'scatter'.
df.plot(@(16), x = 'Duration', y = 'Calories')
df.plot(kind = 'scatter', x = 'Duration', y = 'Calories')
df.plot(kind = "scatter", x = 'Duration', y = 'Calories')
df.plot(kind='scatter', x = 'Duration', y = 'Calories')
df.plot(kind="scatter", x = 'Duration', y = 'Calories')
df.plot(kind= 'scatter', x = 'Duration', y = 'Calories')
df.plot(kind= "scatter", x = 'Duration', y = 'Calories')
df.plot(kind ='scatter', x = 'Duration', y = 'Calories')
df.plot(kind ="scatter", x = 'Duration', y = 'Calories')