Given
best use of sign chart when graphing rational functions.
Find
Choose the correct option
Explanation
Sign chart is very useful to determine where the function is positive or negative , so a rational function must be entirely positive or negative between two consecutive zeros .
Sign chart tells the if the graph of function is above the x-axis or below the x-axis .
so , the best option is to determine where the zeros are for function
Final Answer
Therefore , the correct option is C.
