Answer:
-8
Explanation:
Method 1:
The slope-intercept of an equation of a line:

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

Convert it the the slope-intercept formula:
use the distributive property
add 4 to both sides

Method 2:
The y-intercept is for x = 0. Put x = 0 to the equation:


add 4 to both sides
