Bar Graphs
A bar graph uses what to represent the data?
A pictograph uses what to represent the data?
Pictures that show what data you collected!
I.e. a picture of a pie to show how many pies were bought.
A line plot uses what to represent the data?
A line plot uses X's (or dots) to represent data.
Y to the .....
SKY
Why do we use graphs?
Graphs are easier to understand than just numbers and words alone.
When should we use a bar graph?
when there are larger changes or differences in data among groups.
Would using a picture of a clown be a good representation for a pictogram titled "Cars Sold in a Day?" Why or why not?
No because a picture of a clown misleads the reader about the data they are looking at.
What is a line plot also known as?
Dot plot!
X to the ......
SIDE!
Graphs are drawings that show __________ with _____, _______, and _______.
mathematical information, lines, shapes, and colours
What direction can the bars go in on a bar graph? Are they all equal or unequal?
up/down or side to side rectangles of equal width.
When should we use a pictogram?
when you want to make simple data more visually interesting, more memorable, and more engaging.
When should we use a line plot?
We should only use line plots when we are comparing fewer than 25 numbers.
Why do we need titles on a graph?
They help the reader know what they are about to look at.
GRADE 6's!!
What is a line segment on a broken-line graph?
A line segment connects the two data points
From the "Favourite Season" bar graph answer the following question.
According to the data what is the favourite season?
Summer
Why do we only make pictograms when we have simple data?
It is harder to make it eye catching when there is a lot of data. Instead of eye catching it might just be confusing.
What is the line plot "Number of Cars Sold" missing?
A legend! How many does X represent? 1? 5?
What is a legend?
The legend tells the reader what each bar, picture or dot represents.
GRADE 5's!!
When should you use a multiple bar graph?
when comparing two or more categories of data.
What kind of bar graph is the "Primary Colours" graph?
Multiple Bar Graph
What information is the pictogram missing?
Main title and the legend.
How do we come up with a scale to put on the Y-axis of our bar graphs?
Look at the data and see if it is small enough to put 1,2,3,4,5..... or if you need to skip count 10,20,30,40...