If y varies directly as x, and x=9 when y=15, find y when x=33

Plz i beg u asap ! what is the equation of this graphed line? enter your answer in slope-intercept form in the box.

Is it greater than or less than7*3_9*2

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?