At midnight, the temperature was -8of. at noon, the temperature was 23of. which expression represents the increase in temperature?

Step-by-step explanation:

We have been given that at midnight, the temperature was . At noon, the temperature was .

Since our temperature has increased to 23 degree Fahrenheit from -8 degree Fahrenheit, we can represent this increase in temperature as:

Therefore, the expression represents the increase in temperature.  

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value