Richard is climbing a mountain. The temperature ((7°C) is directly proportional to the height (h metres) above the base camp. When he is 500m above the base camp, the temperature is -5°C. i. Find an equation connecting T and h.

[2]

The base camp is 2500m above sea level. Given that the temperature at the top of the mountain is - 18°C then find:

[1]

ii. The height of the top of the mountain above sea level

iii. Temperature at sea level.