Which graph does not represent a function? A. On a coordinate plane, a curved crosses the y-axis 1 time and the x-axis 2 times.

B. On a coordinate plane, a straight line with a negative slope crosses the y-axis 1 time and the x-axis 1 time.

C. On a coordinate plane, an oval line crosses the y-axis 2 times and the x-axis two times.

D. On a coordinate plane, a line with an s curve crosses the y-axis 1 time and the x-axis 1 time.

step-by-step explanation:

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.

the first one, all those points on the line just make a strait line.

step-by-step explanation:

what is the figure? attach a picture.