Linear Regression Day 2

• A correlation is strong if the data points are close to the line. The correlation coefficient (r) is close to 1 or -1.

• A correlation is weak if the data points are far from the line. The correlation coefficient (r) is close to 0.
  

1. Turn on STAT DIAGNOSTICS (press the mode button)

2. Make two lists in L1 (x) and L2 (y) (stat, Edit)

3. Go to 4:LinReg(ax+b) (stat, CALC, option 4)

4. Calculate. Make sure you see y=ax+b, a=, b=, r²=, and r

   r is the correlation coefficient!

​State the linear regression equation for this data set, rounding all values to the nearest hundredth.

State the correlation coefficient, rounded to the nearest hundredth.

​ State what this correlation coefficient indicates about the linear fit of the data.