Which unit rate is equivalent to 12 miles per gallon?

twenty-four miles over two gallons

two gallons over twenty-four miles

thirty-six miles over four gallons

four gallons over thirty-six miles

When they are asking for that type of question you would divide it so 4 over 36 wouldn't work because of negative gallons don't really work in the real world and 36 over 4 equals wont work cause it equals 9 and 2 over 24 wouldn't work cause of negatives and then there's 24 over 2 so it equals 12 so 24/2=12. 

Yourself by using the internet

The scale factor of what ?