I think it can be a triangle but want another opinion

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

An incoming airplane is x miles due north from the control tower at an airport. a second incoming airplane is y miles due east of the same control tower. the shortest distance between the two airplanes is z miles. which of the following functions would best model the situation above?

On which number line are -3 and its opposite shown