Each answer choice below represents a relation by a set of ordered pairs. In which of the answer choices is the relation a function? Select all correct answers.

Select all that apply:

{(−3,0),(3,−1),(4,10),(−2,0)}
{(5,0),(−2,−1),(−2,10),(2,9)}
{(8,8),(6,9),(1,−2),(−2,9)}
{(−5,7),(−3,−3),(8,−1),(8,5)}
{(7,−5),(6,9),(6,3),(−1,−1)}

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

1: 4 if the wew 35 surfboards at the beach how many were short boards?