Viz 2

.py

#from matplotlib.pyplot import annotate
plt.rcParams.update({'font.size':25, 'figure.figsize': (30,10)})

# Calculate the mean of ocupation, and the x axis of the text
mean = concat_df['ocupation_%'].mean()
text_x = concat_df['client_qty'].max() / 10

# Create the scatter plot, the horizontal line, and the text 
ax = concat_df.plot(kind='scatter', x='client_qty', y='ocupation_%', color='blue')
ax.axhline(mean, lw=8, color='green', label='Mean')
ax.text(text_x,mean, 'Mean occupation: {:.2f}'.format(mean), fontsize=25, va='center', ha='center', backgroundcolor='w')
ax.set_title('Traffic occupation percentage vs client quantity')
plt.show()