Question

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, xThe investment started with $1100 and increased by $63 each year.The investment started with $800 and decreases by $48 each year.

Answer 1

For the first situation, taking x as the number of years since the investment was made, the formula that gives the investment C is:

$C=63x+1100$

In which the initial value is $1100 and it increases at a rate of $63 each year.

Similar is the second case:

$C=-48x+800$

In which the initial value is $800 and it decreases at a rate of $48 each year.