2.) DX(n) = b1 Y(n-1) - a1 X(n-1) + c

4.) The graph of 4 will be similar to 2b with the only difference being that because d is positive, the slope between Y(1), Y(2), Y(3), ...Y(n) will alternate just as X(1), X(2), ... X(n). The significance of c, d is that they will determine how far the two points (s.a. X(1)is squared, cubed, etc., and a difference equation adds or subtracts certain levels of need.

b) 1.0 1.0 .5 1.0 1.0 -1.0 20.0 10.0

DY(n) = b2 X(n-1) - a2 Y(n-1) + d

a) .4 .4 0 0 .7 3.0 6.0 2.0

Some common words found in the essay are:
, First-Order Difference, X0 Y0, X2 Xn, Y3 Yn, level arms, 10 10, proportional constant, difference equation,
Approximate Word count = 687
Approximate Pages = 3 (250 words per page double spaced)