For the following situations write a formula that gives the

For the following situations write a formula that gives the value of the investment, C, in terms of the number of years since the investment was made, x. a. The investment started with $1400 and increased by $57 each year. b. The investment started with $900 and increases by 1 42% each year. c. The investment started with $700 and decreases by 1.2% each year. d. The investment started with $1300 and decreases by $44 each year.

Solution

(a)The investment started with $1400 and increased by $57 each year

C=1400+57x

(b)The investment started with $900 and increased by 1.42% each year

C=900+900*1.42%x=900+900*(1.42/100)*x=900+12.78x

(c)The investment started with $700 and decreased by 1.2% each year

C=700-700*1.2%x=700-700*(1.2/100)*x=700-8.4x

(d)The investment started with $1300 and decreased by $44 each year

C=1300-44x