UNIT 5 Ivan Warehime Day one

UNIT-Five Day-One: Students will use the line of best fit to find equations of line

https://www.youtube.com/watch?v=ugmhjwAQDIE

QUIZ
1.

	The correlation seen in the graph would be best described as:
	Choose:  high positive correlation  low positive correlation high negative correlation  low negative correlation

2.

	You are asked to write an equation for the line of best fit for the scatter plot shown at the right without the use of a graphing calculator.  What should you do first?
	Choose:  Connect the points together.  Find the slope using (1,2) and (9,12).  Find the slope using (4,6) and (5,8).  Decide which two points give the most representative straight line.

3.

The scatter plot at the right shows the number of chapters in a book in relation to the number of typos found in the book.  If you predict the number of typos that would occur in a book containing 12 chapters, you would be:
Choose:  extrapolating  interpolating

Answers
1. high positive correlation the graph goes up in a positive slope, to the right and up.
2.Decide which two points give the most representative straight line.
In the graph find the two points that are close to each other and conect them to make the line of best fit.
3.extrapolating it is to guess what the plot will look like.


quiz from
http://www.regentsprep.org/Regents/math/ALGEBRA/AD4/PracPlot.htm