Let n = the unknown number.
Quotient tells you use division.
n/7 = 39
Multiply both sides by 7 to cancel out the number in the denominator and isolate the variable.
n = 39(7) = 273
n = 273
The correct answer among the choices given is option B. It is the y-values that do not describe an independent variable. Usually, in an equation y is dependent to x values which is the independent variable, it is also the domain and the input in an equation.