Use the given conditions to write an equation for the line in point-slope form and in slope-intercept form. Slope $=-\frac{1}{3}$, passing through $(9,-4)$ Write an equation for the line in point-slope form. (Simplify your answer. Use integers or fractions for any numbers in the equation.)

Step 1 ：Given the slope $m = -\frac{1}{3}$ and the point $(9, -4)$, we can use the point-slope form formula: $y - y_1 = m(x - x_1)$.

Step 2 ：Plug in the given values: $y - (-4) = -\frac{1}{3}(x - 9)$.

Step 3 ：Simplify the equation: $y + 4 = -\frac{1}{3}(x - 9)$.

Step 4 ：\(\boxed{y + 4 = -\frac{1}{3}(x - 9)}\) is the equation for the line in point-slope form.