Data regarding the amount of money earned and saved by teenagers were collected. the graph shows the correlation between money earned (in dollars per hour) and money saved (in dollars): image of a scatter plot with money saved on the x axis and money earned on the y axis with points 1 comma 20, 3 comma 19, 5 comma 15, 7 comma 11, 9 comma 9, 11 comma 5 and 15 comma 3 estimate the average rate of change from x = 3 to x = 11. 8 −1.75 −8 −0.57

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.

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

10 you would take 50/ .2

step-by-step explanation:

according to egenuity the answer is

step-by-step explanation:

d. 344.22