Question: Find the slope of a line perpendicular to the line whose equation is $4x - 6y = -60$. Fully simplify your answer.
1. **State the problem:** We need to find the slope of a line perpendicular to the line given by the equation $$4x - 6y = -60$$.
2. **Rewrite the equation in slope-intercept form:** The slope-intercept form is $$y = mx + b$$, where $$m$$ is the slope.
Start with the given equation:
$$4x - 6y = -60$$
Subtract $$4x$$ from both sides:
$$-6y = -4x - 60$$
Divide both sides by $$-6$$:
$$y = \frac{-4x - 60}{-6}$$
Simplify the fraction:
$$y = \frac{-4x}{-6} + \frac{-60}{-6} = \frac{4}{6}x + 10$$
3. **Simplify the slope:**
$$m = \frac{4}{6} = \frac{2}{3}$$
4. **Find the slope of the perpendicular line:**
The slope of a line perpendicular to another is the negative reciprocal of the original slope.
So,
$$m_{\perp} = -\frac{1}{m} = -\frac{1}{\frac{2}{3}} = -\frac{3}{2}$$
5. **Final answer:**
The slope of the line perpendicular to the given line is $$-\frac{3}{2}$$.