Proofs How do you do them

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?