Graph Analysis
This graph shows how something changes over time using connected points.
Broken line graph
Favourite ice cream flavours.
Bar graph
Name one thing every graph must include.
Title/Labels/Scale/Source
50% of 40
20
The favourite colour of students in your class.
A graph compares how many students prefer pizza, burgers, or tacos using separate bars. What information can you find out?
The number of students who prefer that food type for each category.
Temperature over a week
Broken Line Graph
1 square = 5 students, 4 squares tall
20 students
30 vs 20 difference10
10
The number of pets each student owns.
Quantitative discrete
A scatter plot shows points going upward from left to right.
What type of relationship is this?
Positive correlation
How a $100 budget is spent.
Why is scale important?
Prevents misleading data / improves accuracy
60 to 75 change
15
The heights of students in centimetres.
Quantitative continuous
A circle graph shows 25% for sports. If there are 200 students total, how many chose sports?
50 students.
Hours studied vs test scores
Scatter plot
Are bars touching each other in a bar graph a mistake? Explain.
Yes, that is a histogram. Bar graph should have spaces.
5 out of 20 students have blue eyes. What is the relative frequency?
5/20 = 1/4 = 25%
The types of snacks students bring to school.
Qualitative
A line graph suddenly drops between two months. Name one possible explanation.
Multiple answers -ex. change in temperature
Comparing test scores for different subjects for boys vs girls.
Multiple Bar Graph/Double Bar Graph
Why use a broken axis?
Show differences clearly / save space
6 out of 12 students have completed their homework. What portion of the circle graph would be filled (exact degree)?
180 degrees
The time in minutes it takes each student to run a lap.
Quantitative continuous