Question

Is { (8,5) , (7,5) , (6,2) , (8,3) , (1,-4), (-4,6)} a function? why?

Answer 1

No. because you have One domain value that says 2 different numbers

Explanation:

functions cannot have f(8) = 5 and f(8) = 3 at the same time

because then f(8) is not equal to f(8) it cannot be confusing.