The amount of simple interest earned, n, varies jointly with the rate of interest, r, and the number of years, t. The simple interest earned is $225 when the rate of interest is 4.5% for 4 years. Using the variables r, and t, find the equation that represents this relationship.

$225 = $1250*0.04*4

Step-by-step explanation:

The appropriate formula to use here is i = p*r*t, where p is the principal, r is the annual interest rate as a decimal fraction, and t is the number of years.

Here:

$225 = p*0.045*4 represents this relationship.  p, the principal, is not given, but can be calculated from the above equation:

             $225

p = = $1250

       0.045*4

Then the given relationship is

$225 = $1250*0.04*4

c-4 is the final answer! : )

answer: y=0 if that is what u r looking for