8.Bob Michaels purchased a house 8 years ago for $42,000 (surely not in this our area). This year it was appreciated $67,000. (Real Estate Appreciation)

a.A linear equation V=mt+b,, represents the value V of the house for 15 years after it was purchased. Determine m and b and the value of the house 15 years after it was purchased.

b.solve an equation algebraically to determine how many years after the purchase this house will be worth $80,250.