What is the slope of the line perpendicular to 2 x minus 3 y equals 8?

Answer options with 4 options
A.
negative 3-halves

B.
negative 2-thirds

C.
2-thirds

D.
3-halves

1 answer

To find the slope of the line that is perpendicular to the line given by the equation \(2x - 3y = 8\), we first need to determine the slope of that line.

  1. Rearrange the equation into slope-intercept form (y = mx + b): \[ 2x - 3y = 8 \] Subtract \(2x\) from both sides: \[ -3y = -2x + 8 \] Now, divide by \(-3\): \[ y = \frac{2}{3}x - \frac{8}{3} \] From this, we can see that the slope \(m\) of the line is \( \frac{2}{3} \).

  2. Find the slope of the perpendicular line: The slope of a line perpendicular to another is the negative reciprocal of the original slope. Thus, we take the negative reciprocal of \( \frac{2}{3} \): \[ \text{Perpendicular slope} = -\frac{1}{\frac{2}{3}} = -\frac{3}{2} \]

So, the slope of the line perpendicular to \(2x - 3y = 8\) is \(-\frac{3}{2}\).

The correct answer from the options provided is: A. negative 3-halves.