60. In the standard (x, y) coordinate plane, the graphs of the 3 equations x - 1 = 0, y + 2 = 0, and x + y = 4 form the boundary of a triangle. What is the area of this triangle, expressed in square coordinate units?

Answer and Explanation

Your Answer is

Correct Answer is J

Explanation

Combine the three equations in pairs to get the coordinates of the three vertices: (1, -2), (1, 3), (6, -2), which is a right triangle with two right angles The side lengths are 5, 5, respectively.

S=ab/2=25/2