(Solved): Find an expression for the function whose graph is the given curve. (Assume that the points are in ...

Find an expression for the function whose graph is the given curve. (Assume that the points are in the form \( (x, f(x)) \).) The line segment joining the points \( (-6,7) \) and \( (7,-7) \) \[ f(x)=-\frac{14}{13} x+\frac{7}{13} \] Find the domain of the function. (Enter your answer using interval notation.)