When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation P V 1.4 = C , where C is a constant. Suppose that at a certain instant the volume is 650 cm 3 and the pressure is 80 kPa and is decreasing at a rate of 10 kPa/min . At what rate is the volume increasing at this instant? (Round your answer to the nearest whole number.)

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6

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