Determine shear thinning index using shear stress vs rate plot with eq of line : y$=22\mathrm{.}622$x $+593\mathrm{.}11$

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$\backslash$table$[[88,88,00$:$01$:$,9727,5\mathrm{.}61,27\mathrm{.}5,1091,11\mathrm{.}22,20\mathrm{.}2],[89,89,00$:$01$:$,10470,5\mathrm{.}10,26\mathrm{.}9,1068,10\mathrm{.}20,20\mathrm{.}2],[90,90,00$:$01$:$,11410,4\mathrm{.}59,26\mathrm{.}4,1048,9\mathrm{.}180,20\mathrm{.}2],[91,91,00$:$01$:$,12550,4\mathrm{.}08,25\mathrm{.}8,1024,8\mathrm{.}160,20\mathrm{.}2],[92,92,00$:$01$:$,14010,3\mathrm{.}57,25\mathrm{.}2,1000,7\mathrm{.}140,20\mathrm{.}2],[93,93,00$:$01$:$,15950,3\mathrm{.}06,24\mathrm{.}6,976\mathrm{.}3,6\mathrm{.}120,20\mathrm{.}2],[94,94,00$:$01$:$,18680,2\mathrm{.}55,24\mathrm{.}0,952\mathrm{.}5,5\mathrm{.}100,20\mathrm{.}2],[95,95,00$:$01$:$,22660,2\mathrm{.}04,23\mathrm{.}3,924\mathrm{.}7,4\mathrm{.}080,20\mathrm{.}2],[96,96,00$:$01$:$,29050,1\mathrm{.}53,22\mathrm{.}4,889\mathrm{.}0,3\mathrm{.}060,20\mathrm{.}2],[97,97,00$:$01$:$,41630,1\mathrm{.}02,21\mathrm{.}4,849\mathrm{.}3,2\mathrm{.}040,20\mathrm{.}2],[98,98,00$:$01$:$,78210,0\mathrm{.}51,20\mathrm{.}1,797\mathrm{.}7,1\mathrm{.}020,20\mathrm{.}2],[99,99,00$:$01$:$,0\mathrm{.}00,0\mathrm{.}00,18\mathrm{.}8,0\mathrm{.}00,0\mathrm{.}000,20\mathrm{.}2]]$

Data Graph:

Shear stress vs$.$ Shear rate in Hair gel