Home > English Grammar > How do you describe trends & graphs using prepositions? Describing trends and graphs with prepositions Discover how to describe trends in graphs using prepositions correctly! Examples There has been an increase in the number of people aged over thirty. [ ✓ ] There has been an increase of the number of people aged over thirty. [ ✗ ] Between 1990 and 2000, there was a drop 15%. [ ✗ ] Between 1990 and 2000, there was a drop of 15%. [ ✓ ] We can express a specific trend or change using a noun + in + a noun phrase describing what has changed: a(n) plunge / dip / reduction / plummet / surge / hike / drop, etc. in something Describing Trends in Graphs Examples There has been a significant plunge in the stock market . The data reveals a noteworthy dip in customer satisfaction . When we talk about a change , growth , improvement, trend, variation, or any similar co