Which function is represented by the graph below?

The mean temperature for the first 4 days in january was 7°c. the mean temperature for the first 5 days in january was 5°c. what was the temperature on the 5th day?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Mackenzie buys 6 petunias and 8 marigolds. if she plants 2 flowers in each pot, how many pots dose she need?