identifying variables and interpreting graphs
TRANSCRIPT
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Identifying Variablesand
Interpreting Graphs
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KINDS OF VARIABLES
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KINDS OF VARIABLES
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Remember!Your hypothesis can TELL you what
your variables are!
Ex. If I drink Mountain Dew before bed, then I will not sleep very much.
IV: Drinking Mountain Dew
DV: the amount of sleep
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PracticeUse this hypothesis to identify the
variables:
If I leave all the lights on all day,
then my electric bill will be expensive
IV: __Leaving Lights on or off____
DV: ___Amount of electric bill_____
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If I brush my cat more, then there will be less fur on my furniture
IV: Amount of time brushing the cat
DV: Amount of fur on furniture
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GRAPHING SKILLS
1/6/2021
8
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LINE GRAPH
What can time be measured in???
Seconds - Minutes - Hours – Days - Weeks -
Months – Years - Decades - Centuries - etc.
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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 many people live in Meridian,
Idaho? NO
•To show how much it rained each month
this year? YES- because months and years deal with time.
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BIRTHDAYS?
• Our birthday does deal with timedoesn’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.
◼ Would we use a line graph to show when our birthdays are?
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HOW DO WE MAKE A LINE OR BAR GRAPH?
• A graph ALWAYS has a title!
• A graph has TWO different axis’s
• An axis is either the horizontal line (called x) or the vertical line (called y) that form the base lines of a graph.
Y
X
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X-AXIS AND Y-AXIS
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INTERVALS• When we are setting up a line graph, we need to
decide what intervals we want to use.
• If we are graphing the temperature for a year, do we want to put 365 days on the graph, and 100 different temperatures?
• When we see a horizontal flat line, that means that there was no change during a specific time period.
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Title: _____________________
X Axis
Independent Variable
Y Axis
Dependent
Variable
1 2 3 4 5 6
13
12
11
10
9
8
7
6
5
4
2
1
Intervals
Labeling
Lab
elin
g
Data
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PLOTTING A LINE OR BAR GRAPH
Time in minutes
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BAR GRAPH
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Title: _____________________
X Axis
Y Axis
1 2 3 5 7
13
12
11
10
9
8
7
6
5
4
2
1Intervals
Labeling
Lab
elin
g
Data
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Time (Days)X axis - Dependent
Plant Height (cm)Y axis - Independent
0 1.43
7 2.16
14 2.67
21 3.25
28 4.04
35 4.67
Graph the following information. Which type of graph will you use?
Be sure to have a title, proper labeling, accurate data, and appropriate
intervals.
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Student Name Shoe Size
Scott 10.5
Audrey 6
Levi 14
Lindsey 8
Butch 9
Alexis 5.5
1/6/2021
23
Graph the following information. Which type of graph will you use?
Be sure to have a title, proper labeling, accurate data, and appropriate
intervals.
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0
2
4
6
8
10
12
14
Shoe Size
Scott Audrey Levi Lindsay Butch Alexis
Students
Shoe Comparison
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EXTRA VARIABLE PRACTICE
https://www.youtube.com/watch?v=l0jTMDtX4WY