Nothing can go into 83 so of you square root it you will get a decimal so the nearest whole number You would get is 9 because 9*9=81 and that's the closet that you will get to 83
You did not provide a table however I used
x y
0 -1
3 1
(I tried to make a table above with x,y)
The x intercept is (3/2, 0)
The y intercept is (0, -1)
Slope 2/3
See pic for graph
It would be: 2.836x10^-5
Hope I helped :) Let me know if you have any more questions!