Question

Which description best defines MN¯¯¯¯¯¯¯ ?

the set of point M, point N, and all the points between point M and point N
the set of all points that are collinear with point M and point N
the set containing point M and point N
the set of all points that are the same distance from point M as point N

Answer 1

the set of point M, point N, and all the points between point M and point N

Explanation:

Answer 2

the set of point M, point N, and all the points between point M and point N

Explanation:

We assume you're interested in a description of line segment MN, the portion of the line containing M and N that has endpoints M and N. That description is found in "Answer:" above.

Other choices:

... all collinear points: describes line MN, not segment MN

... point M and point N: describes two points, not a line segment

... points the same distance from each: describes the line that is the perpendicular bisector of segment MN