How is the graph of y=log x transformed to produce the graph of y=log 2x+3 It is stretched horizontally by a factor of 2 and translated up 3 units. It is compressed horizontally by a factor of 2 and translated up 3 units. It is stretched vertically by a factor of 2 and translated up 3 units. It is compressed vertically by a factor of 2 and translated up 3 units.