HELP PLS IM FAILING PYTHAGOREAN THEOREM

2^2 + b^2 = 5^2
4 + b^2 = 25
b^2 = 25 - 4
b^2 = 21
b = square root (21)
b = 4.6

Hi! mark me brainliest if i : )y = 0.213x – 352.0    represents this linear model shown in the data table.plug in the values of x into the equation for a double check.let's try 1980.y = 0.213(1980) – 352.0y = 69.74which is closest to the 70.1 whereas other options do not satisfy the condition. 

The solution to the system of equations (-2,2)