Dependent variables are something that depends on other factors. therefore, if the quality of the public school teacher is poor, it will affect the student's learning badly, and if the teacher's teaching is strong, it affects the student's learning greatly. The student's learning depends on how well the teacher teaches.
The answer is B because you will cancel the x^5 part on top and bottom and the numerator left 6^3 and denominator left 6 6^3=216divid by 6 you will get 36