Question

Assume straight-line appreciation.....
An antique clock is expected to be worth $475 after 3 years and $870 after 6 years. What will the clock be worth after 9 years?

Answer 1

3 years = $475
6 years = $870
9 years = $1265

Answer 2

here is how it does
At 3 years it was worth $475, and at year 6 it worth $870 which means it wen up $870-$475 =$395 in exactly 3 years