Andy pushes a box to the right with 5 n of force. kristen pushes the box to the left with 3 n of force. what will be the resulting (net) force's magnitude and direction?

The forces are applied in opposite direction.
So the net force will be the difference of both forces.
net force =5-3=2N

This force will be in direction of 5N(bigger force) means in direction which Andy is pushing.

Alinear relationship would look like a straight line on the graph. it could have a positive negative or 0 slope. so it could be a line potentially going in any direction but it must be perfectly straight.