Reducing exponential laws to linear form????

Hi folks!

I was wondering if any kind people out there could work throught the following question and explain for me as i must admit i am lost!!(Crying)

atmosperic pressure p is measured at varying altitudes h and the results are shown below:

Altitude h m pressure p cm

500 73.39

1500 68.42

3000 61.60

5000 53.56

8000 43.41

show that the quantities are related by the law p = a e(to the power of little k and little h) kh

where a and k are constants. Determine the values of a and k and state the law. also find the atmospheric pressure at 10,000m

if you can help i will bow down to thee! :-)

Thanks