Match each region with the type of association found between its butterfly population and change in temperature. positive linear trend negative linear trend exponential trend parabolic trend no observable trend

The first thing you should do is plot each region with respect to the temperature and then observe the behavior of each region.
   Region A: not observable trend
 Region B: exponential trend
 Region C: negative linear trend
 Region D: positive linear trend
 Graphic attachment

Region A: No observable trend
There doesn't appear to be a trend correlating temperature with butterfly number in Region A. 

Region B: Exponential Trend
The number of butterflies appears to increase exponentially with temperature.

Region C: 
Negative linear trend. The number of butterflies decreases fairly consistently with temperature. 

Region D:
Positive linear trend. The number of butterflies increases fairly consistently with temperature.