monday october 19, 2015 tuesday october 20, 2015 unit questionwhat role do the forces in the world...
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The cafeteria wanted to collect data on how much milk was sold in 1 week. The table below shows the results. We are going to take this data and display it in 3 different types of graphs.TRANSCRIPT
Monday October 19, 2015Tuesday October 20, 2015
Unit Question What role do the forces in the world play around us?Guiding Question / Learning Target
Strengthen ability to read and create graphs.
Warm-up Why should you include graphs in lab write-ups?
Agenda 1. Graphing notes and practice
Homework 1.Quiz retakes during AT!2.Quiz next class
One more way to explain data! Easy way to see relationships.
Graphing Notes
Tables, charts and graphs are convenient ways to clearly show your data.
Day Chocolate Strawberry WhiteMonday 53 78 126Tuesday 72 97 87Wednesday 112 73 86Thursday 33 78 143Friday 76 47 162
• The cafeteria wanted to collect data on how much milk was sold in 1 week.
• The table below shows the results. • We are going to take this data and display it in 3
different types of graphs.
Types of Variables in Graphing
Manipulated/Independent Variable: The variable that the experimenter changes
Responding/Dependent Variable: The variable that is observed (the one that changes in response to the manipulated variable)
Marshmallow Muscles Larry was told that a certain muscle cream was the newest best thing on the market and claims to double a person’s muscle power when used as part of a muscle-building workout. Interested in this product, he buys the special muscle cream and recruits Patrick and SpongeBob to help him with an experiment. Larry develops a special marshmallow weight-lifting program for Patrick and SpongeBob. He meets with them once every day for a period of 2 weeks and keeps track of their results. Before each session Patrick’s arms and back are lathered in the muscle cream, while Sponge Bob’s arms and back are lathered with the regular lotion,
21.Which person is in the control group?
o A. Larry
o B. Patrick
o C. Sponge Bob
22. What is the manipulated variable?
o A. Weight lifted
o B. Muscle cream
o C. Lotion
o D. Double muscle power
23. What is the responding variable?
o A. Weight lifted
o B. Muscle cream
o C. Lotion
o D. Double muscle power
24. What should Larry’s conclusion be?
o A. The cream works
o B. The cream doesn’t work
o C. Lotion
o D. Double muscle power
There are three basic graph forms.Notice how each of the following examples are used to illustrate the data.
Choose the best graph form to express your results.
Bar Graph
A bar graph is used to show relationships between groups.
The two items being compared do not need to affect each other.
It's a fast way to show big differences. Notice how easy it is to read a bar graph.
Chocolate Milk Sold
53
72
112
33
76
0
20
40
60
80
100
120
Monday Tuesday Wednesday Thursday Friday
Day
Amou
nt S
old
Monday TuesdayWednesday ThursdayFriday
Circle Graph or Pie Chart
A circle graph is used to show how a part of something relates to the whole.
This kind of graph is needed to show percentages effectively.
Chocolate Milk Sold
MondayTuesdayWednesdayThursdayFriday
Line Graph
A line graph is used to show continuing data; how one thing is affected by another.
It's clear to see how things are going by the rises and falls a line graph shows.
Chocolate MI lk Sold
0
20
40
60
80
100
120
Monday Tuesday Wednesday Thursday Friday
Day
Amou
nt S
old
Chocolate
Scale notes for line graphs
Choose the right scale for the axis Must be consistent (same spacing) Must include all data Zero isn’t always data! Choose increments that make it easy to read and place
numbers. If my data is .1 through .3 I don’t want to count by 10’s!
Chocolate MI lk Sold
0
20
40
60
80
100
120
Monday Tuesday Wednesday Thursday Friday
Day
Amou
nt S
old
Chocolate
Chocolate Milk Sold
MondayTuesdayWednesdayThursdayFriday
Bar Graph
Line Graph
Circle (Pie) Graph
The same data displayed in 3 different types of graphs.
Chocolate Milk Sold
53
72
112
33
76
0
20
40
60
80
100
120
Monday Tuesday Wednesday Thursday Friday
Day
Amou
nt S
old
Monday TuesdayWednesday ThursdayFriday
On what day did they sell the most chocolate milk?
a. Tuesday b. Friday c. Wednesday
Chocolate Milk Sold
53
72
112
33
76
0
20
40
60
80
100
120
Monday Tuesday Wednesday Thursday Friday
Day
Amou
nt S
old
Monday TuesdayWednesday ThursdayFriday
Chocolate
MondayTuesdayWednesdayThursdayFriday
On what day was the least amount of chocolate milk sold?
a. Monday b. Tuesday c. Thursday
Chocolate
0
20
40
60
80
100
120
Monday Tuesday Wednesday Thursday Friday
Day
Amou
nt S
old
Chocolate
On what day did they have a drop in chocolate milk sales?
a. Thursday b. Tuesday c. Monday
Choosing the Right Graph
Use a bar graph if you are not looking for trends (or patterns) over time; and the items (or categories) are not parts of a whole.
• Use a pie chart if you need to compare different parts of a whole, there is no time involved and there are not too many items (or categories).
• Use a line graph if you need to see how a quantity has changed over time. Line graphs enable us to find trends (or patterns) over time.
What are the two tricks to go from a data table to a graph?
Dependent
Responding
Y - axis
Manipulated
Independent
X - axis
OR
Take your data tableRotate it 90* LeftAnd the bottom is your
graph’s X, the side, Y
GraphX
Graph Y
To go from a table to a graph
remember DRY MIX Rotate your table 90*. The Row on the bottom becomes your
X axis, the Columns up the side your Y. TURN YOUR PAPER BACK BEFORE YOU CONSTRUCT YOUR
GRAPH!
Making a Graph
Always include:TitleX-axis labels and y-axis labelsThe axis of the graph has consistent spacing.
Types of Relationships in Graphs
Direct Relationship
When values on two variables tend to go in the same direction, we call this a direct relationship.
The correlation between children’s ages and heights is a direct relationship.
That is, older children tend to be taller than younger children.
This is a direct relationship because children with higher ages tend to have higher heights.
Inverse Relationship
When values on two variables tend to go in opposite directions, we call this an inverse relationship.
The correlation between students’ number of absences and level of achievement is an inverse relationship.
That is, students who are absent more often tend to have lower achievement.
This is an inverse relationship because children with higher numbers of absences tend to have lower achievement scores.
What kind of relationship?Direct Inverse
What kind of relationship?Direct Inverse
Effort vs. Grades
Effort
Gra
des
Is there a relationship?
NO!
No Relationship:
Data is in a random pattern. There is no relationship or cause and effect between
variables.
Recap:
What is a relationship?A connection!
What does a line going up represent?A direct relationship
What does a line going down represent?An inverse relationship
Does every graph or all data show a relationship?NO! It depends on the shape of the graph!
Exit Questions
You want to make a graph showing how you spend your day, such as sleeping, school, tv, etc. What is the best type of graph to use?