Answer: the answer is C.
The way you would do it is first write out what you know about the equation
x= money per hour 11= hours worked 71.50= money made
then you think about what the question is asking, in this it is asking for the formula not the answer. So you would then write out another equation
11x= hours x money per hour
So to find out how much Raquel earns per hour you would write out the equation
11x= 71.50 (because the equation translates to 11 times the amount per hour equals the total amount of money made