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#### Raerin

##### Member

- Oct 7, 2013

- 46

**The function for attitude vs air pressure is f(x) = 2100/x**

1. Approximate the instantaneous rate of change at 100 millibars

a) Use the equation to calculate the point (100,___)

1. Approximate the instantaneous rate of change at 100 millibars

a) Use the equation to calculate the point (100,___)

I found the y-value to be 21.

**b) We need two points to calculate a slope, so to approximate the tangent line we use the equation to calculate a point very close to 100: (100.00001, ______) or (99.9999,_____)**

So for the y-value are you supposed to find a number close to 21? But how do you decide what number is the most appropriate? Do you just put in any number of decimals you want?

I did 21.00001 where the slope equals 1. But, apparently slope is supposed to be -0.21. I have no idea how you come to that conclusion.