What does it mean for three events to be mutually exclusive?

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air

Which graph represents the same relation as the table below? x f(x) –2 5 0 1 1 –1 2 –3

Awater truck is filling a swimming pool the equation that represents this relationship is why equals 19.75 x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool