Please solve the question in the picture ?

i believe that the answer is

b. y-1=-2(x-4)

hope this !

what was there favorite food

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.