I was reading a blog on correlation coefficient. It is as stated below

*" For example, suppose a study is conducted to assess the relationship between outside temperature and heating bills. The study concludes that there is a negative correlation between the prices of heating bills and the outdoor temperature. The correlation coefficient is calculated to be -0.96. This strong negative correlation signifies that as the temperature decreases outside, the prices of heating bills increase and vice versa"*

Here as temp decreases price of heating bill increases but in vice versa if prices of heat bills decreases temp wont shoot up right. Then how can we capture this?