Desired \; national \ saving, S^{d}\ , and\ desired\ investment, I^{d}

Real\ interest\ rate, r

Shift in desired investment, due to things 
such as change in expected future MPK

Shift in desired saving, due to things
such as change in government purchase

I

S

The Saving-Investment Diagram

j = 0.8 (slider from 0 to 2, step 0.1)
i = 1.1 (slider from 0 to 2, step 0.1)
A = Intersect(xAxis, yAxis)
B = Point(xAxis)
C = Point(yAxis)
a = Segment(C, A)
b = Segment(A, B)
f = If(1.5 < x < 5.5, 0.5 * x^(1.4) + i)
D = Point(f)
g = If(1.5 < x < 5.5, 7 * x^(-0.9) + j)
E = Intersect(g, f, (2.9874419141286954, 3.4141380415716105))
F = Intersect(f, g, (2.9874419141286954, 3.414138044416075))
c = OrthogonalLine(E, b)
d = OrthogonalLine(E, a)
G = Intersect(d, a)
H = Intersect(c, b)
e = Segment(G, E)
h = Segment(E, H)
I = Point(g)
u: floor(y(G) * 10) / 4
v: floor(x(H) * 10) * 100
text7: "" + u + "%"
text8: "" + v + ""