Let's determine the years:

2000 - 1989 = 11

Let's determine the change in value:

125,000 - 70,000 = 55,000

Assuming a linear progression, we have:

55,000/11 = 5,000 per year increase

**y = 70,000 + 5,000v**where v is the number of years after 1989

Plug in 11 to check our work

y = 70,000 + 5,000(11)

y = 70,000 + 55,000

y = 125,000