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Unit 1 The Science of Food
Activity 1C
Using Data to Create Graphs
Purpose
When reporting experimental results, scientists often create
graphs to help others picture the meaning of data. The three most
common types of graphs used are bar graphs, line graphs, and pie
charts. In this activity, you will use the data tables you created in
Activities 1A and 1B to make several types of graphs. Computer
spreadsheet programs can create graphs for you. Set up a spreadsheet
to match your data table and enter the data. Then go to the create
graphs item and follow the instructions.
Equipment
computer with spreadsheet program (optional)
ruler
Supplies
paper
Procedure
1. Line graphs are used to compare two variables. This type of
graph is often used to show changes over the course of time or
temperature. You will plot one variable along a horizontal axis.
You will plot the second variable, which depends on the fi rst,
along a vertical axis. For instance, a line graph might be used to
show changes in the number of grams of sugar that will dissolve
in 1 L of water at different temperatures. Adding sugar to the
water will not change the temperature of the water. However,
increasing the temperature of the water will increase the
amount of sugar that can be dissolved. Therefore, you would
plot temperatures along the horizontal axis and grams of sugar
along the vertical axis. Use the data table you created in Activity 1A
to create a line graph showing the change in total new products
developed from 1970 to 2000.