What is the equation of the line expressed in slope-intercept form?

a.
y = –3x – 1

b.
y = 3x + 2

c.
y = 2x + 3

d.
y = –2x + 3

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?