Yo cheyla2004 i really need your help my small brain cant comprehand this but what is 8+1+1

Can someone be awesome and me with : (

Is each relation a function? if so, state whether it is one-to-one or many-to-one. 3. (-4,7), (-3,5), (1,4), (3,-8), (5,-11) 4. (-4,8), (-2,4), (0,1), (2,4), (4,8) 5. (-2, 1), (-2,3), (0,-3), (1,4), (3,1)

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)