Help please I'll give 6 points and brainliest​

Which representation has a constant of variation of -2.5

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

Madeline takes her family on a boat ride. going through york canal, she drives 6 miles in 10 minutes. later on as she crosses stover lake, she drives 30 minutes at the same average speed. which statement about the distances is true?