In which set of ordered pairs is y a function of x? A . {(–1, 2), (0, 1), (0, 2), (1, 1)}
B . {(–4, 1), (–3, 1), (–2, 1), (–1, 1)}
C . {(1, –4), (1, –3), (1, –2), (1, –1)}
D . {(2, 5), (3, 6), (6, 5), (2, 7)}
The correct answer is B, but I need can explanation on why it’s B

Then why is the question on here if you know the answer

We need more info then that

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .

Idon’t feel like doing the math but you need to do 2.24 divided by 7