<em><u>So</u></em><em><u>,</u></em><em><u>w</u></em><em><u>h</u></em><em><u>a</u></em><em><u>t</u></em><em><u>s</u></em><em><u> </u></em><em><u>your</u></em><em><u> </u></em><em><u>question</u></em><em><u>?</u></em><em><u>?</u></em><em><u>?</u></em><em><u>?</u></em>
Answer:
"Donna loaned $30 to her brother. He then paid her back $30 the next day" is the correct situation
For it to be non-linear, the rate of change cannot be constant. For the first table the rate is a constant 1 and the second table has a constant rate of -1. The 3rd and 4th tables have no constant rate and thus are non-linear.
The 4th table is increasing while the 3rd table is decreasing.
So the 3rd table, Set C, is the only non-linear negative association between x and y.