Which of these is a function?
y = 2x - 64
{(3, 6), (5, 8), (3, -6), (5, -8)}
x = y^2
{(1, 3), (2, 4), (1, 4), (2, 3)}
My answer y = 2x - 64
is this correct
It is correct, assuming y is the function in the first and third choices.
Can you explain why the others are not functions?