Answer:
slope = - 4
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Given
4x + y = 4 ( subtract 4x from both sides )
y = - 4x + 4 ← in slope- intercept form
with slope m = - 4
Parallel lines have equal slopes, thus
The slope of a parallel line is m = - 4
