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Graphing Your Data. Showing patterns & trends. A picture is worth a thousand words !. Types of data (information). Variables what you measure in an experiment dependent variable measured variable unpredictable change : we don’t know how it will change until we do the experiment Y-axis

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graphing your data

Graphing Your Data

Showing patterns & trends

A picture is worth a thousand words!

types of data information
Types of data (information)
  • Variables
    • what you measure in an experiment
    • dependent variable
      • measured variable
      • unpredictable change: we don’t know how it will change until we do the experiment
      • Y-axis
    • independent variable
      • manipulated variable
      • predictable change: it only changes because we chose how it would change
      • X-axis

The effect of _____________on _____________

INDEPENDENT

DEPENDENT

examples of experiments 1
Examples of experiments 1
  • How does fertilizer affect the growth rate of plants?
    • we set up an experiment testing different amounts of fertilizer on different plants & measuring the growth (height) of the plants:
      • dependent variable (Y-axis)?
        • height of plants
      • independent variable (X-axis)?
        • amount of fertilizer

The effect of _____________on _____________

Amount of Fertilizer

Height of Plants

examples of experiments 2
Examples of experiments 2
  • How does exercise affect heart rate of 10th grade student?
    • we set up an experiment testing different lengths of time of exercise (minutes) on the heart rate of students:
      • dependent variable (Y-axis)?
        • heart rate
      • independent variable (X-axis)?
        • minutes of exercise

The effect of _____________on _____________

Exercise

Heart Rate

examples of experiments 3
Examples of experiments 3
  • What’s the favorite drink of students?
    • we set up an experiment surveying students and asking which is their favorite drink :
      • dependent variable (Y-axis)?
        • number of students
      • independent variable (X-axis)?
        • type of drink

The effect of _____________on _____________

Type of Drink

How many students chose it

making pictures out of data
Making pictures out of data

How’s a critterto choose?

  • Graphs
    • line graphs
      • graphing data that shows continuous change
    • bar graphs (or histograms)
      • graphing data that is in disconnected groups
slide7

10

20

30

15

25

0

5

0

1500

1000

2500

2000

500

1200

How does elevation affect temperature?

Line graph!

18

temperature

1200 ft?

elevation

slide8

0

2

4

6

1

3

5

Gatorade

water

Pepsi

Coke

tea

Which drink do you like best?

Bar graph!

number of students

Red Bull?

RB

RB

type of drink