Applications of derivatives

2010017801

Level: 
B
Let \(p\) be the tangent to the graph of the function \(f(x) = x^{2} -6x +1\) perpendicular to the line \(x - 2y + 3 = 0\). Find the point \(A\), where \(p\) touches the graph of the function \(f\).
\(A = \left [2;-7\right ]\)
\(A = \left [4;-7\right ]\)
\(A = \left [1;-4\right ]\)
\(A = \left [0;1\right ]\)