Answer:
400 CDs
Explanation:
The equation y=5x+0 represents that the profit increases linearly with the number of CDs sold, the slope of 5 indicates that for every 1 CD sold, the profit increases by $5. 
The y-intercept of 0 indicates that there is no profit when no CDs are sold. 
To earn a minimum profit of $2000, we can set up the following equation:
 2000 = 5x + 0 
5x = 2000 
Divide both sides by 5.

x = 400 
 Therefore, we need to sell 400 CDs to earn a minimum profit of $2000.