Eric Nicholas K's answer to raida's Secondary 4 A Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
Let me know if you need more explanation. Remember that for curves above the x-axis, its integral represents the area UNDER the curve towards the x-axis.