I'm really having trouble understanding this question. The definite integral is:
I solved it for its areas and got -30 because the area between 7 and 9 on the x axis contains a rectangle and a triangle, the rectangle has a base of 2 and a height of twelve while the triangle also has a base of 2 but a height of 6. The area is negative due to the area being below the x-axis. However my answer is incorrect and I am at a loss as to how to correctly do this.