Step one: correspond x values and y values together
it would be: 3, 12 and 4, 16
Step two: divide
12/3 = 4 and 16/4 = 4
both numbers = 4
scale factor is 4

Hence , w can be any value from -∞ to 32 ,
Hope helps !
This is what the graph would look like
I would divide each side of the equation by 4.