Predicted value

[K_P]

Hello,
I have this question. And this is the way I solved it. I don't know what's wrong in what I did, the answer must be 1.28, not the answer I got

 

[Dr.Peterson]

What troubles me here is that a table can't predict anything. You can predict something by applying various methods to the data, and will get different predictions depending on the method! But it doesn't say what kind of prediction they require.

I get the same answer you do when I use Excel to make a linear trendline, so your work seems good; but maybe they want you to do something else. Is there any other option you have learned?

Or maybe the answer they give is wrong.

 

[K_P]

What troubles me here is that a table can't predict anything. You can predict something by applying various methods to the data, and will get different predictions depending on the method! But it doesn't say what kind of prediction they require.

I get the same answer you do when I use Excel to make a linear trendline, so your work seems good; but maybe they want you to do something else. Is there any other option you have learned?

Or maybe the answer they give is wrong.

Thank you for your reply. This is the only way I learned.

 

[JeffM]

Your first picture is upside down.

Many historical trend lines are exponential rather than linear. Could that be relevant to this question?