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Mathematics 19 Online
OpenStudy (lordhelix8th):

A. Graph 2 B. Graph 3 C. Graph 1 D. Graph 4

OpenStudy (lordhelix8th):

OpenStudy (mathmale):

Explain your reasoning, please, if you want feedback.

OpenStudy (lordhelix8th):

could you help me how to sovle it. i really dont get ti

OpenStudy (lordhelix8th):

*it*

OpenStudy (mathmale):

What does "best fit" mean in statistics? What 's the purpose of a "regression line?"

OpenStudy (lordhelix8th):

straight line drawn through the center of a group of data points plotted on a scatter plot. Scatter plots depict the results of gathering data on two variables; the line of best fit shows whether these two variables appear to be correlated.

OpenStudy (mathmale):

The strings of dots represent measurements of some kind. We are trying to come up with a straight line that approximates the information given by the dots; we call this a "straight line approximation." Such a line is called a "regression line." Typically, a "good fit" "regression line" will pass through the path of the dots, with some dots above the line and some below it. Look at the four graphs given. Which one best fits this description?

OpenStudy (mathmale):

Your input is really, really good, accurate mathematically, as well as well-written. :)

OpenStudy (lordhelix8th):

So graph four?

OpenStudy (mathmale):

With this info in mind, yours and mine, can you identify the graph that shows the best fit?

OpenStudy (mathmale):

yes. You show a lot of understanding, so let's close this discussion (unless y ou have more questions about this particular problem). Nice work!

OpenStudy (lordhelix8th):

Thank you and have a nice day :)

OpenStudy (lordhelix8th):

so just to clairify. its the graphs the has theline through the dot?

OpenStudy (mathmale):

No, it's one that shows balance in the number of dots above and below the line, which would be #4. Look carefully at the other pics to see examples of low-quality regression lines.

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