Finding the line of regression

[Doffy]

Two normal equations are given :
5a + 10b = 40
10a + 25b = 95
What is the regression line of y on x?

I can easily find the common points from both the equations but how do I find the regression coefficeint?

 

[I like Serena]

Two normal equations are given :
5a + 10b = 40
10a + 25b = 95
What is the regression line of y on x?

I can easily find the common points from both the equations but how do I find the regression coefficeint?

Hi Doffy! Welcome to MHB! (Smile)

A regression equation is usually given as $y=Ax+B$.
The regression coefficient in this equation is $A$ and the y-intercept is $B$.

However, I'm not clear on what you have there.
What are those "normal equations"?
And what do your $a$ and $b$ represent?

 

[Doffy]

Thanks for the welcome!:)

And the above two equations were obtained for deriving the regression line of y on x(it said so in the question).

In my opinion, by solving the above equations, the point I would get could become (x bar, y bar). But I cannot find the regression coefficient. What do you think?