Trend line

If t = 9, then Y = (20 x 9) - 10 = 170. I am not clear what your problem is (and surely the book in which you found the question will also have this answer? !)

Hi Sir, Thanks that is the answer , just a bit puzzled how to calculate the trend line.

It sounds from what you typed that the trend equation was given in the question! If you were asked to calculate it then you would either use the high low method, or regression analysis (depending on the information in the question). Both of these are covered in detail in my free lectures. The lectures are a complete free course for Paper F2 and cover everything needed to be able to pass the exam well.

Thanks again sorry for the ate reply . I would listen the lectures.

I wrote the exam last two weeks and failed what do u suggested. I am thinking of rewriting in July .

Sorry you failed. I suggest that you watch all my free lectures (together with the free lecture notes in front of you). I also assume that you have a Revision Kit from one of the ACCA approved publishers (if not then you must buy one) and you should practice every question and learn from your mistakes.