First, rewrite the equation in slope-intercept form (y = mx + b) to find the slope of the given line:
3x - 6y = 144
Subtract 3x from both sides:
-6y = -3x + 144
Divide every term by -6:
y = (1/2)x - 24
The slope (m) of the given line is 1/2.
The slope of a line perpendicular to another is the negative reciprocal of the original slope. Therefore, the slope of the perpendicular line is:
-2
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