Bar Graph:- These can be used to display the information that would otherwise appear in a table. On a bar Graph, the height of each column shows its value.

Line Graph:- Line graph follow the same principle as bar graphs, except the values are presented as points.


Pie Charts:- A Pie Charts shows how things are distributed; the fraction of a circle occupied by each piece of the “pie” indicates. What fraction of the whole it represents.


Pie chart showing John’s Expenditure, 2004



To Find the amt. John Paid in federal taxes in 2004, We find the slice labeled “Federal Taxes” and Use see that federal taxes represented 20% of this expenditures. Since the whole is $20,000, We find that John’s Federal taxes for 20047 were 20% of $20,000 or 1/5 * $20,000    =    $ 4,000



Number of hours worked per week per employee at Marshville Toy Company

No. of EmployeesHours worked per weak



        No. Of Employees Hours worked per week
                        4                          15
                         9                          25
                         15                          35
                        27                           40
                        5                            50


What is the positive difference between the mode and the range of the numbers of hours worked per week per employee at Marshal Toy Company?


Ans:-    The chart is a short way of showing a list of values that would begin: 15,15,15,15,25,25,25,25,25,25,25,25,25…..,.,…. (then the number 35 fifteen times, then the number 40 twenty- seven times, then the number 50 five times)


The mode is the number that appears in the list with the greatest frequency. Since 27 people worked 40 hours a weak. Therefore mode=40.

The range is the highest value in the list minus the lowest value in the list: 50-15=35. The positive difference between 40 and 35 =(5)   = Ans



Ques:- Approximately What percent of the days with maximum temperature of  90 °F

Or more in St. Louise Occurred in July?

Ans:- From the grey bars on the “hot” day chart. St. Louis has a total of 1+8+15+12+4+4=44 days, when the temperature reached at least 90°F and 15 of temperature reached at least 90°F

These were in July. These July days account for ( 15/44 *100 ) = 34% Of all the hot days in St. Louis (approximately).

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