Answer:
{(-5, 7), (-4, -9), (–5, – 4), (2, -6)}
Step-by-step explanation:
In a function, no two points can have the same x-coordinates. In other words, all x-coordinates of the points must be different.
{(5, -6), (-1, - 2), (2, –9), (–8, -2)}
: All x-coordinates are different: 5, -1, 2, -8. This is a function.
{(-5, 7), (-4, -9), (–5, – 4), (2, -6)}
: Two x-coordinates are the same: -5, -5. This is not a function.
{(-4,2), (-2,8), (-1,6), (5,6)}
: All x-coordinates are different: -4, -2, -1, 5. This is a function.
{(2,2), (-4,9), (9, -3), (-3, 2)}: All x-coordinates are different: 2, -4, 9, -3. This is a function.
