The two lines y=x and x=-9 intersect on the coordinate plane. What is the value of the area of the figure formed by the intersecting lines and the x-axis?
Choose the correct choice from the following choices:
A) 32.5	B) 36.5	C) 40.5	D) 44.5	E) 48.5

Rationale: the point of intersection is ( - 9 , - 9 ) . the triangle has a base of length 9 and a height of 9 . area = ( 1 / 2 ) * base * height = ( 1 / 2 ) * 9 * 9 = 40.5 the answer is c .
Answer: C