Can somone answer 3 thru 10 plz and don't delete my question

Use the knowledge of x- and y- intercepts to choose the correct graph of the equation 3x+6y=6

Witch represents the inverse of the function f(x)=1/4x-12

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?