Describe the graph of the equation y = 4. Is the equation a function? A. vertical line; yes

B. horizontal line; yes

C. vertical line; no

D. horizontal line; no

The answer is b cuz it’s horizontal since if y is always 4 it makes a horizontal line

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.