ine m lies in the xy-plane. The y-intercept of line m is -2, and line m passes through the midpoint of the line segment whose endpoints are (2, 4) and (6, -8). What is the slope of line m ?  Choose the correct choice from the following answers.
A) -3
B) -1
C) -1/3
D) 0
E) Undefined
y intercept of line m is -2 ; i.e. one point on the line m is (0,-2)   Line m passes through the midpoint of (2,4) &amp; (6, -8) i.e. ((2+6)/2 , (4+-8)/2) = (4, -2)   So two point on line m are (0,-2) and (4, -2) As the y coordinates of the two points are same, this is a line parallel to X axis.   So slope is zero.   Answer 0
<result>D</result>
ine m lies in the xy-plane. The y-intercept of line m is -2, and line m passes through the midpoint of the line segment whose endpoints are (2, 4) and (6, -8). What is the slope of line m ?