If you wish to visualize the relationship between `monthly_salary` and `yearly_salary` here is some `python` code you could use:
```py
import matplotlib.pyplot as plt
import numpy as np

# Create the data
monthly_salary = np.linspace(0, 10000, 2)
yearly_salary = 12 * monthly_salary

# Plot it
plt.plot(monthly_salary, yearly_salary)

# Add title and axes labels
plt.title("Yearly Salary against Monthly Salary")
plt.xlabel("Monthly Salary")
plt.ylabel("Yearly Salary")

# Show the plot
plt.show()
```
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