## Tuesday, March 29, 2011

### Data Handling (Bar Chart)

BAR CHART
source: Worksheet 16.1 Q1

The bar chart above shows the traffic condition outside SST at 7.05 in a typical morning.
(a) Find the number of heavy vehicles observed at 7.05 am
(b) How many more cars are there as compared to heavy vehicles at 7.05 am?
(c) What is the total number of vehicles on the road at 7.05 am?
(d) Is it possible to present the above information using the following charts? Justify your answers.
(i)   Pie Chart
(ii)  Line Graph

courtesy of Ms Loh KY

1. (a)8
(b)8
(c)25
(d)(i) Yes.
(e)No, as line graphs show the data collected over a period of time.

2. (a) 9
(b) 5
(c) 25
(d)Yes,......

3. (a) 8
(b) 8
(c) 25
(d)(i) Yes, This information is at a moment of time, which means its not along a period of time. Pie charts can still present this data.
(ii) No, Line graphs are for measuring a thing over a a period of time. Whereas, this is a few thins at a moment.

4. (a) There were 8 heavy vehicles observed at 7.05am.
(b) There were 8 more cars than heavy vehicles.
(c) There were 25 vehicles on the road.
(d)
(i) It is possible as the pie chart will show the number of cars on the road.
(ii) It is not possible as when presented in line graph, the results will be seen as the number of vehicles increasing.

5. and no for (d)

6. a)8
b)8
c25
d) (i)Yes as we can see the number of vehicles by expressing it on a part of the chart
(ii)No as the line graph is used to express data over a period of time

7. a) 8 heavy vehicles.
b) 8 more cars.
c) 25 vehicles
d) (i) Yes. Pie charts can be used to display figures in percentage over 100%.
(ii) No. Line graphs are used to display information over a period of time so it is not suitable.

8. a)8
b)8
c)25
d)Yes. It can see show the number of cars
dii)No. Line graphs are usually used for time.

9. a) 8 Heavy vehicles.
b) 8 more Cars then Heavy vehicles
c) 25 vehicles were on the road.
d) Yes it is possible for the pie chart, but not for the line chart.
i) The pie chart can be used to represent each factor, so you can see the amount of each object.
ii) The line graph is only used to measure changes in one factor.

10. (a) 8 heavy vehicles
(b) 8 more cars than heavy vehicles
(c) 25 vehicles in total
(di) Yes I think that it is possible to represent the information in the following charts. Pie charts can be displayed in figures over percentage.
(dii) No as the line graph is used to expressed the data over a period of time, which is not accurate enough.

11. a) 8
b) 8
c) 25
d) (i) Yes. The pie graph can be used to represent numbers of items.
(ii) No. The line graph is supposed to be used for representing trends.

12. a) There were 8 heavy vehicles observed at 7.05am
b) There were 8 more cars than heavy vehicles at 7.05am
c) There were 25 vehicles on the road at 7.05am
d) It is possible to present the information using the Pie Chart but it is not possible to present the information in the Line Chart. The Pie Chart can show how many vehicles and types of vehicles are driving past at that particular time. The Line Graph is not possible as it shows timing but this information is only recorded at one particular timing.

13. a)8 vehicles
b)8 more cars
c)25 vehicles
d)(i) Yes.Pie chart can be used as it is represent is fractions,percentage,and numbers.
(ii)No.Line graph is used to represent the things over a period of time.

14. a) 8
b) 8
c)25
d) yes it is possible as pie charts can be represented over percentage
dii) line graph are used for time -.-lll

15. (a)8
(b)8
(c)25
(d)
(i)Yes, because the ratio is there.
(ii)No , because line graph is for time.

16. a) 8

b) 8

c) 25

di) Yes, Pie charts can show charts a a certain time and can be used to compare two different numbers

dii) No. Line graphs are only used to display information over a certain period of time

17. (a)8
(b)8
(c)25
(d)Yes, for the pie chart. But no for the line graph. The numbers can still be represented on the pie chart but not the line graph. This is because the line graph is for measuring things that happen over a period of time.

18. a) 8
b) There are 8 more cars than heavy vehicles.
c) There are a total o f 25 cars at 7.05am.
d)(i) Using a pie chart is possible as it can show the number of vehicles in the tim period.
(ii) No, it used more to show the time line where the vehicles passing.

19. (a) 8 vehicles
(b) 8 more
(c) 25 vehicles
(d) (i) yes,as on a pie chart can show many objects,it serves the purpose of the bar graph so it is possible.
(ii)No,as we want to calculate more than 1 object a line graph cannot be used as it only can calculate 1 object but the bar graph can calculate more than 1 object so we cannot use a line graph

20. a) 8
b) 8
c) 25
d) (i)Yes. Pie graph can be used for the question above.
(ii)No. Line graph is used to represent time

21. a) 8 heavy vehicles
b) 8 more cars
c) 25 vehicles
d) i) Yes. We can present any data with pie chart as long as we put the data in percentage.
ii) No. Line graph is for presenting data over a period of time but this data is at 7.05am

22. a)8
b)8
c)25
d)(i)yes
(ii) no because it is used to see trends not the numbers

23. a) 8
b) 8
c)25
d)i) Yes.
ii)No. Line Graph is used for Presenting data over a period of time But the data is specifically at 7.05am