can someone help me out with number 12 is this a function, and do it shows the value of domain, & range

Domain: (-8, 2, 4) || set builder: {x = -8, 2, 4}

Range: (-6, -4, 12, 14) || set builder: {y = -6, -4, 12, 14}

This is not a function because the x-value (-8) is used twice. in a function, no two x-values can be the same

2,4,5,8,10 are divisible by 40