Which linear equation is represented in the graph? y = –2x + 1

y = –2x – 1

y = 2x + 1

y = 2x – 1

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?