- #26

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Thanks a lot ILS!Good point.

You can calculate the area to the right of the y-axis, which is what you did.

The graph is not symmetrical, but it's close enough for our purposes.

You are only asked to give an integer approximation, which is what you did.

Good!

Now that the problem is solved, I was wondering if you could help me understand the solution given in the solution booklet? The solution booklet solves the problem in a single line and I am clueless about what the paper setters did. Here's what is written in booklet:

$$A=\left(4-\int_0^1(f(y)-1)dy \right)+\left|4-\int_{-1}^0 (1-f(y))dy\right|=\frac{9}{2}$$

Any idea what is going on above?