Which of the following points is farthest from the origin: $(1,4)$, $(3,5)$, $(-6,0)$, $(-4,-2)?$
You want to use pythagreon theorum to solve this.
Given the coordinates (x, y)
Find sqrt(x^2 + y^2).
After doing that with all 4 of your coordinates, find the one with the largest value. :))