1. Chapter 1: Activity 6: Graphs
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2. Today we are going to graph.
What are the parts of a graph?

3. The parts of a Graph Axes- one line going across the bottom & another
up the side
Horizontal axis (horizon): goes along the bottom
Vertical axis: goes up the left side of the page

4. YOU TELL ME….
What color is the y-axis? Y X
What color is the x-axis?

5. The parts of a Graph Identifying the Lines
Independent: This is what you measure with regularity.
It is predictable (measuring time every minute, increasing weight by 10 grams, increasing atomic # by 1)
Dependent:This is what you are measuring.
It changes; it is unpredictable; it is what you want to know about the experiment (how does the temp. change, how does speed increase, how does atomic mass change)
Dependent (units)
Independent (units)

6. The parts of a Graph
Units: How do you measure the independent & dependent variables?
-Written inside ( ) parenthesis.
Ex: Celsius (OC), minutes (min), millimeters (mm), grams (g), atomic mass units (amu)
Without units, you don’t know how the temperature or time was measured, and the data is worthless to you
Atomic mass (amu)
Atomic Number (# of protons)
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7. The parts of a Graph
Scale
The interval used (0,50,100 or 2,4,6,8,10).
The distance between each line or mark on a graph.
Temp (oC)
The x and y-axis usually starts with zero on a line graph
year (days)

8. The parts of a Graph Title: The finishing touch
Tells us what all these numbers and lines mean
It is usually named y vs x (dependent vs. independent)
Don’t be too clever or fancy
Atomic mass vs Atomic number
Atomic mass (amu)
Atomic Number (# of protons)

9. Atomic Number (# of protons)
Last But Not Least…
Collecting Data
Make a chart of x and y: and fill in the information
Atomic Number (# of protons)
(X)
Atomic Mass (amu)
(Y)
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10. Make your own…..
Now that you have learned the parts of a graph, I would like you to make your own graph.
You will graph atomic mass vs atomic number. Use a periodic table to do this

15. Types of Graphs
Bar Graph
Line Graph
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16. Line Graph A line graph is a graph used to show change over time!!
What can time be measured in???
Seconds - Minutes - Hours – Days - Weeks - Months – Years - Decades - Centuries - etc.
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17. Would we use a line graph in the following situations:
When to use a line graph?
Would we use a line graph in the following situations:
To show how many people like pizza in this class? NO
To show how much it rained each month this year?
YES- because months and years deal with time.
To show how many people live in Edison? NO
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18. Birthdays? Would we use a line graph to show when our birthdays are?
                                                      
Our birthday does deal with time doesn’t it? (months/years)
But, our birthday is constant, meaning it never changes.
A line graph shows change in time, so we would not use it for this type of graph.
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19. Practice With Graphs
Please study the graphs that you have and answer the questions.
Then we will discuss the your answers.
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21. Q & A
About how much money in total did this person spend on Monday and Thursday? How do you know?
Which day did this person spend the most money? How do you know?
This person spent the most money on Wednesday. I know this because the graph is the highest on Wednesday.
This person spent about $9.00 on Monday and Thursday. I know this because I looked at where the line was for Monday and Thursday and added the two amounts.
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23. To figure out how much gas they need a week.
Q & A
How many days did this person travel less than 30 miles?
Which day did the driver travel the least amount of miles?
Why might someone want to keep track of their miles for the week?
5 days
Sunday
To figure out how much gas they need a week.
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25. The rise and fall of corn
Q & A
About how much corn did the U.S. have in 1991?
What does the y-axis represent in the graph?
Can you think of another title for this graph?
About 77 million acres
Acres of corn in millions.
The rise and fall of corn
in the U.S.
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30. Do these have the same information on them?
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31. Great Job!
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