The sign of the correlation coefficient indicates whether the fitted line is sloping upwards or downwards, so it should be consistent with the sign of the slope of the fitted line. so if the correlation line is poitive so should the regression line
<span>3|x − 8| =18 - 15 = 3 </span>|x − 8| = 3/3 = 1 x − 8 = x = + 8 x = 1 + 8 or x = -1 + 8 x = 9 or x = 7 i.e. minimum temperature is 7 while the maximum temperature is 9