Two points A and B are shown on the graph below. Which of the coordinates of a midpoint of AB?
(4 1/2, 1 1/2)
(5, 0)
(4 1/2, 1)
(4 1/2, 2)

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.

f(y)= y^2-10y+25

step-by-step explanation: