In [ ]:
import numpy as np
import matplotlib.pyplot as plt
import random

In [ ]:
def f(x): 
    return(9.8 * x **2)
def f1(x):
    return(x)

In [ ]:
print(f(10))

In [ ]:
x1 = np.arange(-10,10,0.01)

In [ ]:
plt.plot(x1,f(x1),x1,f1(x1))