Hello please could help me with this question?

Consider the graph of the exponential function y=3(2)×

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.

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?