# Question #d8efe

$x$ can be any number.
First, we need to find a spot where the tangent line is parallel to the secant line from $x = - 1$ and $4$. To have a parallel tangent line, the slope of the tangent line (or derivative) has to be the slope of the secant line. Just by looking at the graph, $y$ is a horizontal, because $\sqrt{3}$ is a constant. The slope of the secant line will be 0, because nowhere on the curve ever changes in $y$ value. That means that we need to find a spot where the derivative is $0$, or just about anywhere on the curve, because
$\frac{d}{\mathrm{dx}} \left(c\right) = 0$, assuming $c$ is a constant. So, the answer could be anything.