HELP PLS Which of the following does not set up the pythagorean theorem correctly for this problem?

Ican figure out 20 shares multiply by $117.98 =2359.6920 shares multiply by $124.32=2486.40then take 40 shares multiply by $128.48=5139.20after that i'm lost any be greatly appreciated.

What function has a range {yly< 5}? question on picture above^

If the tip varies directly with the number of guest which equation represents between the tip, t, and the number of guest, g?