Question

when two regression lines coincide then the value of r is​

Answer 1

Answer:

Q. when two regression lines coincide then the value of r is

Step-by-step explanation:

Answer = The two lines of regression coincide i.e. become identical when r = –1 or 1 or in other words, there is a perfect negative or positive correlation between the two variables under discussion. (v) The two lines of regression are perpendicular to each other when r = 0.

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Answer 2

Answer:

If the lines of regression coincide, then the value of the correlation coefficient is 1 or -1.

Step-by-step explanation:

What are regression lines:

• The Regression Line is the line that best fits the data, with the smallest overall distance between it and the points drawn on a graph.
• In other terms, the regression line is a line that is used to reduce the squared deviations of forecasts.

Result:

• The two lines of regression coincide i.e. become identical when r = –1 or 1 or in other words, there is a perfect negative or positive correlation between the two variables under discussion.