Estimating p50 for Hemoglobin/Myoglobin

[Gannon]

http://moodle.lsu.edu/file.php/9836/Homework/HW9.htm"
Part B of the first problem is the one I'm looking at. It asks to "estimate the p50" of each enzyme; how do I do this with what I've been given? Once I have graphed the two, do I find it from the linear equations? Can anyone point me in the right direction?

Thanks.

 

[chemisttree]

The link doesn't work. Why not just copy the information you were given?

 

[Gannon]

I have pretty much solved it, though I had a feeling the link wouldn't work. Thanks, though!