Ques.2 Take any company from the internet or annual report and exhibit the sales and profits for the last five years through graphical representation. Which type of graph in your opinion would be most suitable.

When presenting ideas that include references to data, it can be helpful to make the point using a graph or table. These visual methods can make the point much stronger than simply describing the data. While they can be powerful methods, they also have the potential to ruin a presentation if they convey the wrong message or they confuse the audience. Appropriate use of graphs and tables is one way to enhance the message you are delivering.
Graph Types
There are five basic types of graphs that are used most frequently. There are more complex types that are used for specific purposes, usually technical in nature, which will not be discussed here because they would rarely be used by most of us. A graph is really a graphical representation of one or more sets of data. A set of related data is referred to as a data series. For example, the sales of product X each year for the past five years would be one data series. Here are the five basic graph types:
Area - This graph shows the relationship of different parts to a whole over time. One example would be to show the breakdown of the total organization profit by product line over the last five years. This graph can show many (4-6) data series at a time.
Column - This graph shows the differences in individual values vertically. It can be used to show the differences between values in different time periods or other data groupings. Examples include showing the total number of phone calls each month for the past year or the number of orders received by each order method (fax, phone, e-mail, web, walk-in) over the last month. This graph works best with fewer (1-3) data series.

Bar - This graph shows the differences in individual values horizontally. It is not a good choice for showing values in different time periods. It works better for showing the results of one or two data series. One example would be to show the popularity of the top eight answers to a survey question.
Line - This graph shows values at different points in time. It is usually best to have equal time intervals along the horizontal axis of the graph. One example would be to show the trend in the number of customer service calls handled by the five offices each month over the last year. A line graph can display many (4-6) data series quite well.
Pie - This graph shows the proportions of each segment of a whole. This graph only handles one data series. An example would be to show the proportion of funding provided to the organization by each level of government in the past year.