What's the answer ? to this question

You could use the equation y=mx+b

Find the slope of the two coordinates. I would personally suggest using stack and subtract:

(0,2) 2-5 -3 3
(2,5) = =
0-2 -2 2

We have the slope but we need to find the y-intercept.

y=3
--x+b
2

Plug one of the coordinates in the constructed equation above:

2=3
-- (0)+b
2

2=0+b
-0=-0

b=2

We found the slope and y-intercept. Now we have our complete equation. The equation is:

y=3
--x+2
2

Have a blessed day!