import matplotlib . pyplot as plt 
year=(2014,2015,2016,2017,2018,1019)
onion=(60,50,55,70,40,35)
tomato=(55,50,40,30,80,40)
plt.plot (year,onion,color="red",label="onion")
plt.plot (year,tomato,color="blue",label="tomato")
plt.legend()
plt.xlabel("year")
plt.ylabel("price")
plt.show()