What is the y-intercept of a line that has a slope of –3 and passes through point (0, –7)?

the y-intercept is equal to -7

Step-by-step explanation:

The y-intercept can be identified if we have the general form of the equation for a line:

where is the slope, and is the y-intercept. (so we are looking for

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the information we have about the line is:

slope:

passes through the point: (0, -7), where and .

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To find the y-intercept, first we need the equation of the line.

The equation of the line can be found with the point slope equation (since we know the slope and the point this equation is useful):

we substitute all the known values:

and we clear for

Now we have an equation of the form mentioned at the beginning

comparing with the equation we obtained

the y-intercept is equal to -7

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.

lol 2

step-by-step explanation: