Exchange Rate (USD/GBP)
2.00
1.90
1.80
1.70
1.60
1.50
1.40
1.30
1.20
1.10
1.00
0
SGBP
D GBP
10 20 30 40 50 60 70 80 90 100
Quantity (billions of GBP)

Determine the equilibrium exchange rate.