Is the relation a function? Yes or No? (4,5),(4,-7), (4,2), (4,0), (4,9)

No it's not a function

Step-by-step explanation:

When the domain repeats either once or more, it's never a function

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}