help pls show work on 63 and 65 and explain why the steps happen, i'm very confused, thanks

IRate 10f Change In E'xercises 6366, you are given the dollar value of a product in 2012 and the rate at which the value of the product is expected to change during the next 5 Years. Write a linear equation that gives the dollar value V of ' the product in terms of the year t. (Let t = 0 represent 2010.) _ 2012 Value Rate . .$1850. , $250 increase per year 54- $156 $4.50 increase per year {1.5512200 $1600 decrease per year E} 66. $245,000 $5600 decrease per year