A line intersects the graph of $y=x^2$ twice. One intersection point has an $x$-coordinate of $-4$, and the other point has an $x$-coordinate of $2$.

1. Sketch both graphs and write the equation of the line.

2. What is the measure of the acute angle that the line makes with the $x$-axis?

   Hint (b):

   Draw a slope triangle between the two points. Find the measure of the angle that corresponds to the angle the line makes with the $x$-axis using $\tan^{−1}(?)=θ$.

   Answer (b):

   $63.4^\circ$ (or $116.6^\circ$)