Question

Graph the data from your yeast fermentation exercise (Table 7-1). Would a bar graph or a line graph be more appropriate?  On the x-axis place the independent variable (Sugar substrates) and on the y-axis place the dependent variable (Difference in CO₂ gas column heights).  Add a descriptive title and label axes appropriately with corresponding units.  Create a digital version of your graph and upload your file to this file upload question.

Table 7-1.  Data Table for Fermentation of Sugars by Yeast.

Tube number	Solution Added	Initial Height of Gas Column (mm)	Final Height of Gas Column (mm)	Difference in Gas Column Height (mm)
1	Water	0.0	0.0	0.0
2	Glucose	0.0	16m	16mm
3	Sucrose	0.0	14mm	14mm
4	Lactose	0.0	0.0	0.0
5	Maltose	0.0	3.5m	3.5m

Answer 1

The given data is nominal data or categorical data in which variables have unique labels without any quantitative value.
A bar graph is a pictorial representation of the categorical data. The frequencies of the particular categories can be represented by mostly using vertical bars.
These variables are usually qualitative value without the presence of natural ordering.
Therefore, bar charts are used for nominal data. Solutions are independent variables, and they are usually placed on X-axis while the height of gas columns are the dependent variables and they are placed on the y-axis.