Question

For a set of data, the mean of x values is 4.5, the slope of the line is -2 and mean of y values is 1. Y-intercept is .

• A. 10
• B. 2.5
• C. 6.5
• D. -8

Answer 1

The correct option is A 10

Given, $\overline{x}$=4.5, $\overline{y}$=1, M=-2
The intercept B is given by the formula,
$B=\overline{y}-m\overline{x}$
= $1-4.5\times (-2)$
= 10