Which set of ordered pairs is a function? {(-2,1),(-4,2), (0,3), (4,1),(-2,5)}

{(-5,1),(-3,2),(-1,3), (1,4),(3,5)}

{(-1,5),(-1,4),(-1,3),(-1,2),(-1,1) }

{(-6, -4),(-4,-2), (0,0),(-4, 2),(-6,4)}

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.