Help ASAP please again

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

How can you tell when x and y are not directly proportional?