Beth describes her current location: " i'm directly south of the theater. the restaurant is 9 km south of the theater. plot and label a point representing the restaurant. what are the coordinates of the point?

For this case, what I did was to graph both points on the same Cartesian plane.
 Assuming that the theater is at the origin of the coordinate system.
 The red dot is the theater.
 The blue dot is the restaurant.
 The restaurant coordinates are:
 (0, -9)
 answer
 the coordinates of the point (0, -9)