Which graph could be used to show the situation described?
the temperature starts at 0 degrees and decreases by 12 degrees every hour.

C.

Step-by-step explanation:

We are given,

The temperature on the graph starts at 0 degrees and decreases by 12 degrees every hour.

Now, according to the options:

A. In this figure, the temperature starts from a point between ( 10,20 ) and not from 0. So, this is not correct.

B. In this figure, the temperature starts from the point 3 and not from 0. So, this is not correct.

D. In this figure, the temperature starts from 0 but it is decreasing by 1 degree every hour, which is not according to the given statement. So, this is also not correct.

C. In this figure, the temperature starts from 0 and it is decreasing appears to be decreasing by 12 degree every hour. Thus, it represents the given statement.

Hence, figure C is the correct option.

there will be 35 boys in each team. : )

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.