Reason Quantitatively to Complete the Following Sentences $C = 100 - 20 t$

Short Answer

Reason quantitatively to complete the following sentences.
A) As the demand for housing increases, the price of housing _____.
B) Say that $C = 100 - 20 t$

describes the relationship between the Celsius temperature C of a liquid and the time t in hours. Then "- 20t" tells you that _____.