Day1:students will be able to use the line of best fit to find equations of lines

A line of best fit  (or "trend" line) is a straight line that best represents the data on a scatter plot. This line may pass through some of the points, none of the points, or all of the points.

Example:http://youtu.be/ugmhjwAQDIE
1)find the equation for the following 3 problems.
Data Set 1:
POINTS
     x y
A 9 26
B 13 32
C 21 42
D 30 53
E 31 56
F 31 59
G 34 61
Data Set 2:
POINTS
      x y
A 95 17
B 92 19
C 87 12
D 83 17
E 75 9
Data Set 3:
POINTS
     x y
A 2 1
B 3 4
C 6 8
D 10 12
E 15 14
F 17 17
G 19 21

Answer:

y = 1.38x +13.46
Answer:
y = 0.40x !19.9
Answer:
y = 1.01x + 0.54