18. is the relation {(3, 5), (–4, 5), (–5, 0), (1, 1), (4, 0)} a function? explain. type your answer below

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Solve this problem! extra ! 3025/5.5 = a/90.75

Jenny earned a 77 on her most recent test jenny score is no less then 5 points greater then 4/5 of terrance’s score if t represents terrance score which inequality represents the situation