Nick walks up 5 stairs in 6 seconds. Edwin walks down 2 stairs per second. Jeff walks up 7 stairs in 6 seconds. Simon walks down 3 stairs per second. If we graph each of these relationships with the number of stairs traveled (y-axis) with respect to time in seconds (x-axis), we get the lines shown in the graph. Identify and drag the name of each person to the line that represents his situation. Nick Edwin Jeff Simon

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry.how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.