4. Determine whether the representation is a function or not. Will mark brainiest

Step-by-step explanation:

the representation given is a function,

because each input has exactly one output.

(1,4) is on graph of f(x)

f(1) = 4

so 1/4 f(x)

1/4 f(1)

1/4. ×4

1

so point for function 1/4. f(x) is (1,1)

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.