Answer:
C
Step-by-step explanation:
For this, to figure that out plug in (-1, -1) into the x and y coordinates and solve:

Since -1 = -1 is a true statement, (-1,-1) is a solution to this equation.
Given:
A school is planning a 4th grade field trip. There are 157 students and 9 teachers in the 4th grade. Each bus holds 45 people.
Required:
To find the number of buses does the school need to make the field trip.
Final Answer:
There area total

166 people.
Let the number of bus be x.
Each bus holds 45 people, therefore

Final Answer:
4 buses need to make the field trip.
It can't be for sure a perpendicular bisector cuz you don't know what kind of triangle you are dealing with so that one's out. It's not necessarily an angle bisector either for the same reason. A median means that PS will go through the opposite side right in the center, and again, depending upon what type of triangle you have, this could be true...So it is an altitude, which is like a height of a triangle. It drops down from a vertex and forms a right angle with wherever it goes through. So D.