12. Given that \(k\) is a positive constant,
- sketch the graph with equation
$$y = 2 | x | - k$$
Show on your sketch the coordinates of each point at which the graph crosses the \(x\)-axis and the \(y\)-axis.
- Find, in terms of \(k\), the values of \(x\) for which
$$2 | x | - k = \frac { 1 } { 2 } x + \frac { 1 } { 4 } k$$