6. If the image of the proportional function passes through the point (-3,2), then the image must also pass through the point.

A.(2, 1 3)

B.（

, a 1)

C.(- 1, 1)

D.(2,-2)

16. As shown in the figure, in the semicircle O, AB is the diameter and CD is the chord. If AB= 10, the maximum value of △COD area is _ _ _ _ _.

EF is the center line with the same length, which is equal to half of the chord AB. GE, EF and FH constitute the chord GH, so if the maximum value of GE+FH is needed, the maximum value of GH is needed.