We are concerned with the segment of the line y Part 2 of 3 y 10 5 -5 -10 2 = 72 X- 14 that begins at (0, -14) and that ends at (7, 10.5 21/2). X 4 6 -15 14 dx can be interpreted as the area of the triangle above the x-axis minus the area of the triangle below the x-axis. The area of the lower triangle is X- 0 2 bh=28 and the area of the upper triangle is 2 x