**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 Employees | Hours worked per weak |
---|---|

4 | 15 |

9 | 25 |

15 | 35 |

27 | 40 |

5 | 50 |

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).**