Mathematics

Problem

The line

x = c

cuts the triangle with corners

(0, 0)

;

(1, 1)

and

(9, 1)

into two regions. For the area of the two regions to be the same,

c

must be equal to (A)

\frac{5}{2}

(B) 3 (C)

\frac{7}{2}

(D) 3 or 15