試題詳解

8. (5%) A community is laid out as a rectangular grid in relation to two main streets that intersect at the city center. Each point in the community has coordinates (x,y) in this grid, for -10≤x≤ 10, -8 ≤y≤ 8 with x and y measured in kilometers. Suppose the value of the land located at the point (x,y) is V thousand dollars, where

Estimate the value of the block of land occupying the rectangular region1≤ x≤ 3,0≤ y≤ 2.
(A) 759 thousand dollars
(B) 859 thousand dollars
(C) 959 thousand dollars
(D) None of the above