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

B. {-4&#6#_#6&$&3+#-&3:#

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like: