Question

1) Using matplotlib, graph the line of slope -2 going through the point (1,1).

2) Instead of graphing the previous line, plot 5 evenly-spaced points on that line in the interval [0,1] (including 0 and 1).

Answer 1

ANS 1:

CODE:

#ANS :- 1

# the below two lines are required packeges to plotting lines and points on that line.

import numpy as np

import matplotlib.pyplot as plt

x=np.linspace(0,1,5)    #linspace() is one of the important method of numpy and used to divide points as per given Number/data.

y = -2*x + 3     #Here slope m=-2 and find the intercept value c = 3 by putting the value (1, 1) since line passing through this point(1, 1)

plt.plot(x,y, '-r',label="line y=-2*x + c")   #this is used to plot line in matplotlib packages.

plt.title("line plot with slope = -2 passing through (1,1)")  #Used to set title of the graph in matplotlib

plt.show()                                                #Used to show() the ON CONSOLE plotting.

ANS 2:

CODE:

import numpy as np

import matplotlib.pyplot as plt

x=np.linspace(0,1,5)

y = -2*x + 3

plt.plot(x,y, '-r+')

plt.title("five evenly spaced point on the line")

plt.show()