Title and axis labels in Matplotlib - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the title of the plot?

Look at the code below. What will be the title shown on the plot?

Matplotlib

import matplotlib.pyplot as plt
plt.plot([1, 2, 3], [4, 5, 6])
plt.title('Sales Over Time')
plt.xlabel('Month')
plt.ylabel('Revenue')
plt.show()

A Sales Data

B Sales Over Time

C Month

D Revenue

💡 Hint

The title is set by plt.title() function.

The plt.title() function sets the main title of the plot. Here, it is 'Sales Over Time'.

❓ Predict Output

intermediate

What is the label of the x-axis?

What label will appear on the x-axis in the plot below?

Matplotlib

import matplotlib.pyplot as plt
plt.plot([10, 20, 30], [1, 4, 9])
plt.title('Growth Chart')
plt.xlabel('Time (years)')
plt.ylabel('Value')
plt.show()

A Growth Chart

B Value

C Time (years)

D Years

💡 Hint

The x-axis label is set by plt.xlabel().

The plt.xlabel() function sets the label for the x-axis. Here, it is 'Time (years)'.

🔧 Debug

advanced

Why does this code not show the y-axis label?

The code below is supposed to show a y-axis label, but it does not appear. What is the problem?

Matplotlib

import matplotlib.pyplot as plt
plt.plot([1, 2, 3], [3, 2, 1])
plt.title('Sample Plot')
plt.xlabel('X Axis')
plt.ylabel('')
plt.show()

A The y-axis label is empty, so nothing shows.

B plt.ylabel() is missing parentheses.

C plt.title() must be called after plt.ylabel().

D The plot() function must include label parameter.

💡 Hint

Check the argument passed to plt.ylabel().

The y-axis label is set to an empty string '', so no label appears on the y-axis.

❓ data_output

advanced

What are the axis labels after this code?

After running the code below, what are the labels of the x-axis and y-axis?

Matplotlib

import matplotlib.pyplot as plt
plt.plot([5, 10, 15], [2, 4, 6])
plt.xlabel('Distance (km)')
plt.ylabel('Speed (km/h)')
plt.xlabel('Time (seconds)')
plt.show()

A x-axis: 'Time (seconds)', y-axis: 'Speed (km/h)'

B x-axis: 'Distance (km)', y-axis: 'Speed (km/h)'

C x-axis: 'Distance (km)', y-axis: ''

D x-axis: '', y-axis: 'Speed (km/h)'

💡 Hint

The last plt.xlabel() call overwrites the previous one.

The second plt.xlabel('Time (seconds)') replaces the first x-axis label. The y-axis label remains 'Speed (km/h)'.

🧠 Conceptual

expert

Why is it important to label axes and add titles in plots?

Choose the best reason why adding titles and axis labels is important in data visualization.

A They allow the plot to run faster in Python.

B They make the plot look colorful and attractive.

C They increase the file size of the plot image.

D They help viewers understand what the data and axes represent.

💡 Hint

Think about how someone else reads your plot.

Titles and axis labels explain what the data shows and what each axis means, making the plot clear and easy to understand.