Question

practice problem #2
background: clams were placed into various temperatures of water. use the information in the data table below in order to create a proper scientific graph and to answer the corresponding questions.

water temperature (°c)	number of developing clams
20	92
25	120
30	140
35	99
40	72
45	36
50	0

1. what is the dependent variable?
2. what is the independent variable?
3. what is the optimum temperature for clam development?
4. what is the mean number of clams per sample?
5. approximately how many clams would be developing in 10 degree celsius water?
6. what is it called when you make predictions about data not yet recorded, such as the prediction we made in question number 5?

use pencil to make graph!

Explanation:

1. The dependent variable is what is being measured, which is the number of developing clams as it depends on water temperature.
2. The independent variable is what is being changed or controlled, here it's the water temperature.
3. The optimum temperature is the one with the highest number of developing clams, which is 30°C with 140 clams.
4. The data does not provide information on the number of clams per sample.
5. There is no data for 10°C, so we cannot calculate the mean for it.
6. Making predictions about un - recorded data is called extrapolation.

Answer:

1. Number of Developing Clams
2. Water Temperature
3. 30°C
4. No information provided
5. Cannot be determined
6. Extrapolation