Sometimes you get too much or too less information in explaining the graphs which may include Line Graphs, Bar Graphs, Pie Charts to name a few. So what is the best strategy to tackle this problem ? You have to make a right strategy within 25 seconds so that you can easily explain the graph in 40 seconds.
Here are some of the tips that works for most of my students :-
1) Identify the inputs given in the graph. Check the inputs/ variables given in the X axis and Y axis. For example - You are sometimes given population, sales etc in the Y axis and years range in the X axis.
2) Check what the overall graph is about. It may be related to population density of different countries, sales in different companies etc. So you may start by saying - This line or bar graph illustrates/ gives information about ..................................
3) Sometimes there are too many lines in a single graph. Firstly check the highest point then the lowest point, check the similar patterns, trends ( increasing or decreasing or fluctuating etc ). For instance you can start by saying that the highest population amongst all the countries was recorded by USA which was around 50 millions in the year 2002 and the country with lowest population was France with a population of approximately .......................... . The two countries namely India and China has witnessed an almost similar trends in their population over the past 10 years. However, the population of India showed a dramatic increase after 2010 ..................................
4) You can use some connectors also to improve your speaking. You can use - However, It is interesting to see .............. , Although, Similarly, Overall, On the contrary.
5) Some terminologies that can be used for expressing the trends - Dramatic increase, Significant increase, Exponential increase, decreasing/ increasing trend, fluctuating trend, declined considerably, huge increase, rapid fall, etc.
6) You can also use - population of X was almost 3 times then Y country. The sales of company X was almost 1/3rd then the sales of company Y.
If the information is too less then my advice is to speak slowly and you can add some additional information as well related to the topic.
If you have any queries or suggestions please right to me in the comment box.
Thanks.