Help me in this question

Question in the picture ,,,

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- October 10th 2009, 01:09 AMr-soyHi >> help me
Help me in this question

Question in the picture ,,,

See - October 10th 2009, 02:57 AMSoroban
Hello, r-soy!

Eyeballing the graph, the answers seem to be:

. .

- October 10th 2009, 03:56 AMr-soy
Thank you from my heart, but you have not explained to me how I got the answer?

- October 10th 2009, 04:51 AMearboth
- October 10th 2009, 05:16 AMr-soy
A thousand thanks to you

Now I understood the solution of the question