## Tuesday, September 29, 2009

### Jemineth's scribepost for september 24 2009

( question #6 )

6. For a science fair experiment, Mitchell
measured the height of a plant every
Monday for four weeks. He displayed the
data in a line graph and a pictograph.

a) What information does each graph provide ?
• Tally Chart
• Line Graph
• Pictograph
All of those graphs above give or show representation of the same data(s).
( How long the plant grows every week ) Each graph has its own way of showing the plants growth in which case, the Tally Chart shows the plants growth by a chart with the weeks number on one column, and the cm of the growth in the other column. The way that the Line Graph shows the growth over time is by placing the dot somewhere in the grid paper, which is measured by the area and the intervals, and connecting the dot to dot as time passes by. Finally , the pictograph shows the plants growth over time by pictures. The pictures will be given a specific value (eg. 10) and once provided that value you are responsible for getting the other answers by working with what you have (value).

b) Between which two weeks did the plant grow at the same rate ?

The plant grew at the same rate between the first week to the second week , and from the second week to the third week.

Why ? Because between those two weeks the growth rate both came up by 20's.

c) Between which two weeks did the plant grow most in height ? Which graph shows this more clearly ?

The plant grew the most between the third week to the fourth week. The graph that shows this clearly is that the line graph.

Why ? Because the line graph is best for showing changes over time. Which means the image given to you has lines, those lines are used to represent the data's . But the what's important is that hose lines weren't put there with no reason , they were placed there in a way that when you first look at the graph to solve questions that involve changes over times , those lines will quickly get your eyes attention.

• Tally Chart
The advantage of using a tally chart is that its good for keeping information, and organization. The disadvantage of using a tally chart is that, when your doing a given work for solving things, its not the best and fastest way to get the answer.

• Line Graph
The advantage of using a line graph is that it is good for showing and representing data's that involve changes over time. Which makes it preferable the most for types of questions such as #6. A disadvantage of using a line graph is that, sometimes the dots that represent a specific value aren't accurate especially if the intervals are going from one small area on the grid paper to the other with large amounts of numbers . So in order to solve questions its either you try measuring with a ruler, or take a guess on what the value is.

• Pictograph
The advantage of using a pictograph is that when the pictures that are representing data are accurate to its value. It would be easy to work with and solve things. Another advantage is that a pictograph is also good in showing changes over time especially if values are accurate, but most people prefer a line graph because for them its easier to work with. A disadvantage of using a pictograph is that most of the times, the value of the pictures aren't accurate, so like the line graphs disadvantage its either you measure with a ruler, or take a guess.

This will be the end of my scribe post. Thank you :)

NOTE : That these things (questions ) can be seen @ www.mytextbook.ca for home works or for some other things .

PS. SORRY IF THERE WEREN'T MUCH OF PICTURES , AND NO VIDEO . HOPE YOU ENJOYED :)

Kim8-73

GOOD JOB JEM!
Very detailed

ChristineAnne8-73

great job jem! nice use of colors

Caitlin873

GOOD JOB JEM... I couldn't find anything wrong with your graph it was very good and has lots of good information about the graph....

abby 8-73

Good job Jem!! I agree with Christine and Kim. I like how u use the color and how u did ur scribe post and its also very detailed.

Eric.P 8-73

Good job. Everything was very well done. There was nothing wrong I could see.

jarret8-73

GOOD JOB JEM! I though it was terrific.

hannah873

nice :D
i like how you explained everything so clearly.

Darnell8-73

Nice job Jem. Lots of detail and information. The post is very long too.

kaitlin.L 8-73

i hate this mr.harbect how do you copy a picture from the ones u posted so the peolpe that cant, go to mytextbook? so they can stil post pictures?

vicky873

Great job Jem! I like all the detail and iformation. Everything on your post is accurate! Keep it up!

Kisha8-73

good job

Camille873

Jem Jem jemmy jem jem ... you did such a great job! it was neat and organized. great job!

Alexander8-73

Whoa so long, nice job though Jem.