What kind of display would be the best way to represent the data below?

\begin{tabular}{|l|c|c|}
\hline
Type of species & Critically endangered (\%) & Endangered or vulnerable (\%) \\
\hline
Plants & 13 & 70 \\
\hline
Invertebrates & 0 & 35 \\
\hline
Freshwater fish & 9 & 37 \\
\hline
Amphibians & 7 & 30 \\
\hline
Reptiles & 5 & 28 \\
\hline
Birds & 0 & 12 \\
\hline
Mammals & 2 & 21 \\
\hline
\end{tabular}

A. Bar graph
B. Pie chart
C. Line graph
D. Scatter plot



Answer :

To determine the best type of display to represent the given data, let's consider the features and purpose of each type of graph:

1. Bar Graph:
- A bar graph is ideal for comparing different categories.
- It allows you to see the difference in values between groups at a glance.
- This type of display is useful when you need to represent multiple sets of data for each category, such as critically endangered and endangered or vulnerable species.

2. Pie Chart:
- A pie chart is used to show parts of a whole.
- It is less effective when you want to compare multiple categories or when you have many categories.
- In this scenario, it wouldn't effectively show the comparison between critically endangered and endangered or vulnerable species across the different types of species.

3. Line Graph:
- A line graph is useful for showing trends over time.
- Since the data provided does not involve time series or continuous data, a line graph is not suitable for this representation.

4. Scatter Plot:
- A scatter plot is used to show the relationship between two variables.
- This isn't applicable here because we're dealing mainly with categorical data rather than pairs of numerical data that need to be correlated.

Given the data about different types of species and their respective percentages of being critically endangered or endangered or vulnerable, a bar graph would be the best display. It allows clear comparison between the two different conservation statuses across the various species categories, providing a straightforward visual representation of the data.

Thus, the best display for the given data is a bar graph.