Answer:
- 2
Explanation:
The slope intercept form of an equation of a line:

m - slope
b - y-intercept
We have the equation of a line in the standard form

Convert to the slope-intercept form:
subtract 4x from both sides
divide both sides by 2

Therefore the slope is equal to -2.
Other method:
If we have the equation of a line in standard form Ax + By = C
or in general form Ax + By + C = 0, then the formula of a slope is

We have A = 4 and B = 2. Substitute:
