To find the equation of the line in point-slope form, we first need to determine the slope \( m \) of the line that passes through the points (5, 5) and (3, 9).
The formula for the slope \( m \) between two points \((x_1, y_1)\) and \((x_2, y_2)\) is given by:
\[ m = \frac{y_2 - y_1}{x_2 - x_1} \]
Substituting the coordinates of our points:
\((x_1, y_1) = (5, 5)\) and \((x_2, y_2) = (3, 9)\),
we have:
\[ m = \frac{9 - 5}{3 - 5} = \frac{4}{-2} = -2 \]
Now that we have the slope, we can use the point-slope form of the equation of a line, which is:
\[ y - y_1 = m(x - x_1) \]
We can choose either point for \((x_1, y_1)\). Let's use the point (5, 5):
\[ y - 5 = -2(x - 5) \]
This is the equation of the line in point-slope form:
\[ y - 5 = -2(x - 5) \]
This equation is already simplified and in the correct format. Thus, the final answer is:
\[ \boxed{y - 5 = -2(x - 5)} \]