Answer:
slope = -

Explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Given
3x + 2y = 12 ( subtract 3x from both sides )
2y = - 3x + 12 ( divide all terms by 2 )
y = -
x + 6 ← in slope- intercept form
with slope m = -
