A student is hanging a bookcase on the wall that holds their digital video disc (DVD) collection where each DVD in its case weighs the same. The weight of the bookcase with 10 DVDs is 30.4 pounds, and the weight of the bookcase with 45 DVDs is 38.8 pounds. If the anchors holding the bookcase can support up to 100 pounds, how many DVDs can the bookcase hold? This is from the Writing Linear Functions Unit Test from Connections Academy 8th grade question 11
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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.

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step-by-step explanation:

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