For a given data of 5 observations $∑y= 311, ∑x^2 = 10$ and $∑xy = 90.$ The equation of the trend line
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → $y_t = 62.2+9x$
The equation of the trend line is,
$y=a+bx$
$=\frac{∑y}{n}+\frac{∑xy}{x^2}x$
$=\frac{311}{5}+\frac{90}{10}x$
$=62.9+9x$