Find the Formula for the Function $f ( x ) = x ^ { 2 }$

Multiple Choice

Find the formula for the function.
-A point P in the first quadrant lies on the graph of the function f $f ( x ) = x ^ { 2 }$ . Express the slope of the line joining P to the origin as a function of x.

A) m = 2x
B) $m=\frac{2}{x}$
C) m = x
D) $m=\frac{1}{x}$