The equation given is in the point-slope form of a linear equation, which is written as:
\[ y - y_1 = m(x - x_1) \]
where \(m\) is the slope and \((x_1, y_1)\) is a point on the line. In your equation:
\[ y - 1 = \frac{2}{3} (x - 6.5) \]
the slope \(m\) is \(\frac{2}{3}\).
Therefore, the answer is:
\[ \frac{2}{3} \]