Which set of ordered pairs represents a function? \{(-8, -4), (-8, -1), (4, 5), (8, 7)\}{(−8,−4),(−8,−1),(4,5),(8,7)} \{(0, -8), (-8, -8), (9, 0), (-6, -6)\}{(0,−8),(−8,−8),(9,0),(−6,−6)} \{(8, 4), (8, -2), (-7, 6), (5, 2)\}{(8,4),(8,−2),(−7,6),(5,2)} \{(-1, 2), (-5, -3), (-8, 9), (-5, -8)\}{(−1,2),(−5,−3),(−8,9),(−5,−8) }

Question 2 (essay worth 10 points) (03.02 mc) in δabc shown below, point a is at (0, 0), point b is at (x2, 0), point c is at (x1, y1), point d is at x sub 1 over 2, y sub 1 over 2, and point e is at the quantity of x sub 1 plus x sub 2 over 2, y sub 1 over 2: triangle abc is shown. point d lies on segment ac and point e lies on segment bc. a segment is drawn between points d and e. point a is at the origin. prove that segment de is parallel to segment ab.