What is the first step you should take if you need to find the correlation coefficient for this graph without using a computerized tool?

a ) construct the estimated regression line.

b ) calculate the residuals.

c ) calculate the mean of the residuals.

d ) find the difference between each y-value and the predicted value.

answer correctly

There are points marked on the coordinate plane in the form of Ordered pair that is (x,y).

→First we Construct estimated regression line,then we calculate residuals, that is among number of lines which we predicted or drawn as a regression line ,which line can be best regression line.

→Residuls tells which Regression line is best among Number of lines drawn as a regression line.

So, the first step will be

Option A

Construct the estimated Regression line.

a. 74 degrees

step-by-step explanation:

because the lines through the side and the box in the corners shows that these are congruent triangles and since they are mirrored the 37 degrees is also mirrored so the answer is 37 * 2 which is 74.