Graphing Section 1.3. Why use graphs? Graph- used to make data easier to read and understand- shows...
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Transcript of Graphing Section 1.3. Why use graphs? Graph- used to make data easier to read and understand- shows...
![Page 1: Graphing Section 1.3. Why use graphs? Graph- used to make data easier to read and understand- shows patterns and trends.](https://reader035.fdocuments.in/reader035/viewer/2022072006/56649d0b5503460f949df7bd/html5/thumbnails/1.jpg)
GraphingSection 1.3
![Page 2: Graphing Section 1.3. Why use graphs? Graph- used to make data easier to read and understand- shows patterns and trends.](https://reader035.fdocuments.in/reader035/viewer/2022072006/56649d0b5503460f949df7bd/html5/thumbnails/2.jpg)
Why use graphs? Graph- used to make data easier to read
and understand- shows patterns and trends
![Page 3: Graphing Section 1.3. Why use graphs? Graph- used to make data easier to read and understand- shows patterns and trends.](https://reader035.fdocuments.in/reader035/viewer/2022072006/56649d0b5503460f949df7bd/html5/thumbnails/3.jpg)
What is a graph? Visual display of information or data X-axis- horizontal- independent variable Y-axis- vertical- dependent variable Must have labels for each axis, a title, and
units if appropriate You must select the proper scale.
Don’t make the scale too large or too small Make sure you can read the data easily
![Page 4: Graphing Section 1.3. Why use graphs? Graph- used to make data easier to read and understand- shows patterns and trends.](https://reader035.fdocuments.in/reader035/viewer/2022072006/56649d0b5503460f949df7bd/html5/thumbnails/4.jpg)
Examples of Proper Scale and Improper ScaleDistance Traveled in One Day
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Time (hours)
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ance
(mile
s)
Distance Traveled in One Day
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-5 0 5 10 15 20 25
Time (hours)
Dis
tanc
e (m
iles)
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Time
![Page 5: Graphing Section 1.3. Why use graphs? Graph- used to make data easier to read and understand- shows patterns and trends.](https://reader035.fdocuments.in/reader035/viewer/2022072006/56649d0b5503460f949df7bd/html5/thumbnails/5.jpg)
Types of Graphs Line, Bar, Pie Line Graph
Shows relationship between dependent and independent variable- often shows change over time
Can compare more than one event as long as scale is the same
Used most often in this class and science in general
![Page 6: Graphing Section 1.3. Why use graphs? Graph- used to make data easier to read and understand- shows patterns and trends.](https://reader035.fdocuments.in/reader035/viewer/2022072006/56649d0b5503460f949df7bd/html5/thumbnails/6.jpg)
Reading Line Graphs
![Page 7: Graphing Section 1.3. Why use graphs? Graph- used to make data easier to read and understand- shows patterns and trends.](https://reader035.fdocuments.in/reader035/viewer/2022072006/56649d0b5503460f949df7bd/html5/thumbnails/7.jpg)
Reading Line Graphs Linear Relationships- makes a straight line
both sets of numbers increase both sets of numbers decrease one set increases while the other set decreases one set of numbers increases while the other
stays exactly the same one set of numbers decreases while the other
stays exactly the same.
Plant Growth
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Week
Heig
ht (in
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Linear (Series1)
Height of Grass vs. Fertilizer
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Fertilizer (oz)
Heig
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Linear (Series1)
Temperature of Creek at various Depths
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Depth (cm)
Tem
pera
ture
(Cels
ius)
Series1
Linear (Series1)
![Page 8: Graphing Section 1.3. Why use graphs? Graph- used to make data easier to read and understand- shows patterns and trends.](https://reader035.fdocuments.in/reader035/viewer/2022072006/56649d0b5503460f949df7bd/html5/thumbnails/8.jpg)
Reading Graphs Interpolation- reading between data points Extrapolation- reading beyond data points
Less reliable than Interpolation Maybe something unexpected occurs after known
data points
Temperature in Room after Turning on Heat
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Time (minutes)
Tem
pera
ture
(deg
rees
Cel
sius
)
A
b
c
![Page 9: Graphing Section 1.3. Why use graphs? Graph- used to make data easier to read and understand- shows patterns and trends.](https://reader035.fdocuments.in/reader035/viewer/2022072006/56649d0b5503460f949df7bd/html5/thumbnails/9.jpg)
Problems with graphs You might use the wrong scale
Don’t put two different units on the same graph- like Celsius and Fahrenheit or Celsius and Kelvin
Can be used to distort data- maybe the scale is manipulated to make something seem worse than it is or not as bad as it is
Temperature in Room after Turning on Heat
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0 5 10 15 20 25 30
Time (minutes)
Tem
pera
ture
(deg
rees
Cel
sius
)
A
b
c
![Page 10: Graphing Section 1.3. Why use graphs? Graph- used to make data easier to read and understand- shows patterns and trends.](https://reader035.fdocuments.in/reader035/viewer/2022072006/56649d0b5503460f949df7bd/html5/thumbnails/10.jpg)
Bar Graph + Circle/ Pie Bar: Compare information collected by
counting Example: Comparison of how many in this class
like which cookies. Try it.
Circle/Pie: Shows how something can be broken down into parts Shows percents
![Page 11: Graphing Section 1.3. Why use graphs? Graph- used to make data easier to read and understand- shows patterns and trends.](https://reader035.fdocuments.in/reader035/viewer/2022072006/56649d0b5503460f949df7bd/html5/thumbnails/11.jpg)
Making Circle/Pie Graphs Use our cookie data:
Determine % of each category Multiply % by 360
Gives you degrees of the circle Make Graph- will need protractor and compass
![Page 12: Graphing Section 1.3. Why use graphs? Graph- used to make data easier to read and understand- shows patterns and trends.](https://reader035.fdocuments.in/reader035/viewer/2022072006/56649d0b5503460f949df7bd/html5/thumbnails/12.jpg)