11.1#10

Hello professor, I m not sure what I am doing wrong with this problem. I plugged in (0,0) to get A which was 140. Then since it said they were equally spaced multiples of 10 I added 10 to the remaining ones. Thank you for your help!

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OK, I see why it would be easy to be confused in this way but you're misreading the problem. It doesn't say that the equal spacing is 10. It says that the they are 1) equally spaced, and 2) multiples of 10.  It doesn't tell you which multiple of ten is the gap between two neighboring contours. You can only eyeball approximately what points the contours are passing through, but you can tell that one of the variable is a 0 or a 1 where the lines pass through the bounding box and guess the multiple of 10 by guessing the value of the other variable, and that should give you a reasonable guess of the intercontour gap.  If you do this for several of the intersections of the contours with the bounding box that should help you confirm your estimate of the gap