As shown in the figure, point P (x, y) is on the image with inverse scale function y = 2 / X. through point P, make PA ⊥ X axis at point a, and make Pb ⊥ Y axis at point B. the area of rectangular OAPB is

As shown in the figure, point P (x, y) is on the image with inverse scale function y = 2 / X. through point P, make PA ⊥ X axis at point a, and make Pb ⊥ Y axis at point B. the area of rectangular OAPB is

PA = y
PB=x
∴Soapb=PA*PB
=xy
And ∵ P (x, y) on y = 2 / X
∴xy=2
∴Soapb=2