Solve the Problem $$y = x ^ { 2 }$$ At (X, Y), Another at the Origin, and the Third

Essay

Solve the problem.
-A right triangle has one vertex on the graph of $$y = x ^ { 2 }$$ at (x, y), another at the origin, and the third on the
(positive) y-axis at (0, y). Express the area A of the triangle as a function of x.