The temperature at 12 noon was 10°C above zero. If it decreases at the rate of 2°C per hour until midnight, at what time would the temperature be 8°C below zero? What would be the temperature at mid-night?

The answer to your question is a) 21:00   b) -14°C

Step-by-step explanation:

Data

Temperature at noon = 10°C

rate = 2°C/hour

a) Do a chart to solve this problem

            Time          Temperature

            12:00                10°C

             13:00                 8°C

             14:00                 6°C

             15:00                 4°C

             16:00                 2°C

             17:00                  0°C

              18:00                -2°C

             19:00                -4°C

             20:00               -6°C

             21:00                -8°C

b)

            22:00                -10°C

             23:00               -12°C

            24:00                -14°C

both graphs increase on their domain

neither graph has a y-intercept

step-by-step explanation:

the following points can be visualized easily from the graph