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. Find the y-intercept.

• A. 2.5
• B. 6.5
• C. 10
• D. -8

Answer 1

The correct option is C

10

$Given,\overline{x}=4.5;\overline{y}=1;M=-2\text{The intercept B is given by the formula}B=\overline{y}-M\overline{x}=1-4.5\times (-2)=1+9=10$