Is the relation a function? Why?

No

Step-by-step explanation:

It is not a function because a input can not have two different output if you input 11 once and get an output of 5 then input 11 again you should still get 5 not 8

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.