Which logarithmic graph can be used to approximate the value of y in the equation 2^y = 3 ( graphs attached)

Neither of the given graphs is the answer for your question... Since 2^y=3, y=log_2(3), by definition of log. You can see that y is a fixed value, so the graph must be a horizontal line. The value of y doesn't change as x change, since x doesn't even appear in the equation.

Z-Score= x-value minus mean (average) / standard deviation so z score equals -2.16 or 1.54% below the mean based on table a