For which values of k would 83 3 1 k 2 45 be a function Cons

For which values of k would {(8,3), (3, -1), (k, 2), (4,5)} be a function? Consider the following graphs. Which of these are functions?

Solution

(a) if you follow the secuence of the points, is impossible they are a funtcion, if you don\'t, for any values of k.

(b) only A is a funtion, in th others, every x have 2 y... so they aren\'t funtions