To be a function, each x - component of order pair must have unique y - component.
Answer: I and IV
Use the distance formula: d² = (x₂ - x₁)² + (y₂ - y₁)²
d² = 50² + 80²
= 2500 + 6400
= 8900
d = √8900
= 94.3
Answer: 94.3 km
ø=Angle theta
a= length of opposite side a
h=length of hypotenuse h
