I understand that 4f(2)=100 is the same as f(2)=25 which means a coordinate on the graph of f(2) is at (2, 25) but what is the y-coordinate of squareroot of f(x) when the x coordinate is 2

If 4f(2) =100, then the point (2,y) on the graph of y = vf(x) has a y-value of