Hello all, I searched the web for this answer, could not find it, as such i turn to you all smart people. I have read the thread

Cubic equation from 4 coordinates
However i have no idea what to do, if someone can help me before the end of April would be appreciated.

Ok the question is:

*graph* coordinates that can be known, (0,0) (1,8) (2,6) (3,0) (4,-4) (5,0) and (6,18)

Now the actual question is to find accurately the area enclosed by this curve and the x-axis, but to do it accurately, one would have to use definite integral. However i have used the Trapezium Method and the Triangle area method to kinda get an area, but the question after this one requires this one to be dead accurate

i have battled with it for some time; I have nooooo cooking clue of how to do this....

Please help...