Handin C7-3 Page 1 of 2 MF30 Name: (4) 3. Air pressure around a plane decreases as the plane's altitude increases. The following graph and exponential regression function is shown below. Y=(1050.31) (0.8731) where y = air pressure (mb) when x = altitude (km) 1000 900 800 700 600 Air Pressure (mb) 500 400 300 200 100 10 12 14 16 5 Altitude (km) (a) Use the exponential regression function to estimate the pressure at an altitude of 15 km, to the nearest tenth of a millibar (mb). (b) Using the graph, estimate the altitude, to the nearest kilometre, where the pressure reaches 500 mb and 50 mb