The Chen family bought a small business. The equation yˆ=4.2x−12.9 models the business's cash value, in thousands of dollars, x years after they bought the business.

Which statement best explains what the y-intercept of the equation means?

After the Chen family bought the business, the business lost $12,900 in 4.2 months.
The business was $12,900 in debt when the Chen family bought it.
The Chen family paid $12,900 for the business.
The business lost $12,900 every year after the Chen family bought it.