Carter invested $800 in a savings bond that pays simple interest according to the formula below.
1 = Prt
In the formula, / represents interest, P represents the money invested, or principal amount, ris the
simple interest rate, and t represents the time, in years, that the money is invested.
If the savings bond pays 4% interest, how much interest will Carter earn after 9 years?

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)