Follow the steps for graphing a rational function to graph the function R(x)=x+4/x(x+12).

Use the real zeros of the numerator and denominator of R to divide thex-axis into intervals. Determine where the graph of R is above or below thex-axis by choosing a number in each interval and evaluating R there. Select the correct choice below and fill in the answerbox(es) to complete your choice.

A.

The graph of R is above thex-axis on theinterval(s)

right parenthesis

and below thex-axis on theinterval(s)

right parenthesis

(Type your answers in interval notation. Use a comma to separate answers asneeded.)

B.

The graph of R is above thex-axis on theinterval(s)

.

(Type your answer in interval notation. Use a comma to separate answers asneeded.)

C.

The graph of R is below thex-axis on theinterval(s)