How do I find Experimental KCl solubility with this data:

Test tube solute: Crystalizing temp
KCl
35g/100ml 23.97C
40 39.55
45 57.10
50 75.20

Spacing is a problem on these boards. If this is 35 g/100 @ 23.97 C

40 g/100 @ 39.55 C,
45 g/100 @ 57.10 C, and
50 g/100 @ 75.20 C, then I recommend that you graph the data. Then pick the temperature and read the solubility.