A small business's profit , in dollars, from selling units of a certain product is modeled by the equation . If this equation is graphed in the -plane, which of the following is the best interpretation of the -coordinate of the line's -intercept in the context of the problem?
The fixed costs of the business, in dollars
The profit earned per unit sold, in dollars
The number of units the business must sell to cover its costs
The maximum profit the business can earn, in dollars
