The graph shown is a transformation of the basic tangent function \(y = \tan x\).

The vertical stretch factor \(a\) is determined by the amplitude of the graph. The graph reaches approximately 3 at \(x = \frac{\pi}{2}\), indicating \(a = 2\).

The horizontal shift \(b\) is determined by the phase shift of the graph. The graph crosses the x-axis at \(x = \frac{\pi}{4}\), so \(b = \frac{\pi}{4}\).

The vertical shift \(c\) is determined by the midline of the graph. The midline appears to be at \(y = 1\), so \(c = 1\).