A linear model projects that the number of bachelor's degrees awarded in the United State will increase by 19,500 each year. In
2001, 1.28 million bachelor's degrees were awarded. Use the inverse function to predict the number of years after 2001 that 1.7 million bachelor's degrees will be awarded.
Let the number of years after 2001 be x, then 1280000 + 19500x = 1700000 19500x = 1700000 - 1280000 = 420,000 x = 420000/19500 = 22 years. x = 22 years.
What you do on one side of the equation, you do to the other. She added 10x on the right side and subtracted 10x on the left when she should have added 10x on both sides.
