You spent $16.56 to fill up you car with gasoline. If you bought 6 gallons of gasoline, what is the constant variation?

Question

I have a lot of trouble with math in general but especially algebra 2. any help would be appreciated please and thank you. 

Answer 1

$16.56 / 6 = $2.76 per gallon

 

2.76 is the constant of variation