 In words, for all points \((x, y)\) in the unit square that have an \(x\)-coordinate smaller than \(1/2\), the transformation \(T\) doubles the value of \(x\) and halves the value of \(y\). For all the points \((x, y)\) that have an \(x\)-coordinate greater or equal to \(1/2\), \(T\) transforms \(x\) in to \(2x-1\) and \(y\) into \(y/2 + 1/2\). This is illustrated in Fig. 5a.