How do I find the area under a curve from a lab graph?

[interXdragon]

Okay, so my question is: given the picture below, how can I find the area below the graph (in the shaded region) ? It's for a lab that I did in class, but it wasn't until i finished the whole picture that i realized that I didn't know how to calculate the area of this graph.

Thanks.

http://unityofthedragons.org/oker.jpg

 

[Tide]

HINT: Think trapezoids! :)

 

[whozum]

If an estimate is good enough, just notice that each square represents 0.16*1 Nm = 0.16 Joules. Then just add up the squares and estimate for the non-complete squares.

 

[interXdragon]

HINT: Think trapezoids! :)

at this point, i really need a definite answer ASAP, perhaps u can teach me how to use a calculator?

 

[Integral]

at this point, i really need a definite answer ASAP, perhaps u can teach me how to use a calculator?

Perhaps I am reading this wrong!

You have been given some very sound advise in this thread already. Why don't you show us some effort on your part.