Find all intervals on which the graph of f(x)=(x-1)/(x+3) is concave upward

Select the correct answer from each drop down menu a marketing company conducted a survey to assess the audience response to different aspects of a new advertisement. the company randomly chose 100 people to watch several advertisements of different lengths. the respondents were asked to note which ads they disliked. the table shows the survey results duration of ad number of viewers (seconds) who disliked ad 60 relationship between the duration of advertisements and the correlation coeficient for this data set is close to based on this information, we can conclude that there is a the audience dislong them reset next