The calculations for 2, 4, 8 year can be derived as follows,
For simple interest:
S.I = 
P= principle
T= Time
R= Rate
For 2 year;
S.I =
= $224
Amount = $2224
For 4 year;
S.I =
= $448
Amount = $2448
For 8 year;
S.I =
= $896
Amount = $2896
I would think you would use 1/3 of a cup but I am not sure.Hope it helps!
The simplified version of this equation would be
-x + y

<em>We choose any values of x and calculate the value of y</em>

<h3>Answer: (-4, 1), (-1, 2), (2, 3).</h3>
Theres an infinite amount of numbers because you could have 0.10123 to 0.19998298 its never ending