If an Equation of the Tangent Line to the Curve $y = f ( x )$

If an equation of the tangent line to the curve $y = f ( x )$ at the point where $a = 8 \text { is } y = 4 x - 7 \text {, }$ $\text { find } f ( 8 ) \text { and } f ^ { \prime } ( 8 ) \text {. }$

A) $\begin{array} { l } f ( 2 ) = 25 \\f ^ { \prime } ( 2 ) = 3\end{array}$
B) $\begin{array} { l } f ( 2 ) = - 8 \\f ^ { \prime } ( 2 ) = 8\end{array}$
C) $\begin{array} { l } f ( 2 ) = 7 \\f ^ { \prime } ( 2 ) = 4\end{array}$
D) $\begin{array} { l } f ( 2 ) = 25 \\f ^ { \prime } ( 2 ) = 4\end{array}$
E) None of these