Two planes intersect in exactly one point

If two planes intersect, then their intersection is a line. A line contains at least two points. If two lines intersect, then exactly one plane contains both lines. If a point lies outside a line, then exactly one plane contains both the line and the point.

it has the same slope and a different y-intercept

hope this : )

the furthest the dog can be is 508 meters away from the house, and the closest he can be is 492 meters away from the house.