Model answer: line graph about shop openings and closures.
This task was taken from the IELTS 17 academic book from Cambridge and shows a typical line graph with dynamic data over an 8-year period. It’s in the past so I will use the past tense. I mentioned the sharp drop in 2015 in the overview as this is something that really stands out. Usually, I don’t mention specific details (years) in the overview though.