In a trend line equation $y=a+b(x-\bar{x})$, 'a' is equal to:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → mean of y
$y = a + b(x - \bar{x})$
$\text{At } x = \bar{x},\ y = a$
$\text{Thus, } a = \bar{y}$
$a = \bar{y}$