What changes will you make to the code so that the bars are visible for all four points?

Q. What changes will you make to the code so that the bars are visible for all four points? But do keep in mind that the x-axis must begin from the point -3.

import matplotlib.pyplot as plt

a = [3, 6, 9, 12]
b = [30, 48, 54, 48]
plt.xlim(-3, 5)
plt.bar(a,b)
plt.show()

Answer :-

If we change the limits of X-axis so that all the points being plotted fall in the range of limits, all values will show. Thus, we have changes the limits from -3 to 15, in place of -3 to 5.

import matplotlib.pyplot as plt

a = [3, 6, 9, 12]
b = [30, 48, 54, 48]
plt.xlim(-3, 15)
plt.bar(a,b)
plt.show()

Output :-