import numpy
import matplotlib.pyplot as plt
import pandas as pd

#read data from pandas into a numpy array
#assume this is our dataframe
df = pd.DataFrame({'age':    [ 3,  29, 30],
                    'height': [94, 170,200]})

#reshape data
m = df.values
m = m[:,::-1].transpose()

#plot the graph
plt.scatter(m[0], m[1])
plt.plot(m[0], m[1], '-')
plt.show()