We have the following:
The first thing is for each case the quadrant where it could be, like this:
Temperature:
The temperature is on the x-axis, therefore -2, it can be in quadrant II or III
Number of people who are sledding:
It is located on the y-axis and therefore -7, it can be in quadrant III or IV
Which means that the answer is quadrant III since this is where the two variables coincide.