Which of the following equations could be written such that y is a function of x? Ox-y O- Question 2 (20 points) Which of the following data sets of ordered pairs is the only one that could represent a function? (2,1), (4,3), (3,5), (5,2), (3,1)) ((3,5), (3,2), (3,1), (3,7), (3,2)) ((5,2), (4,2), (7,2), (8,2), (4,2)) ((9,1), (1,9), (3,6), (6,3), (6,1)} Question 3 (20 points) If (12) 4(12) 20, which function gives f(x) (x) = 4x (x) = 12x f(x)=4x-20 Ax)=12x-20