How does the digit in the ten thousands place compare to the digit in the thousands place

A digit in the ten thousand place has a value of 10,000 times the value of the mere digit. While a digit in the thousands place has a value 1,000 times the value of the digit. So to compare you can do 10,000 / 1,000 = 10, which means that a digit in the ten thousand place values ten times what the same digit values is it is the thousand place. 

I'm pretty sure it's b). i try drawing the functions out and b is the one that stands out or isnt a "line"