Answer:
4x - y = - 20 in y=mx+b form is: y = 4x + 20
Explanation:
Given the equation

What is the slope-intercept form of linear/line function?
The slope-intercept form of the line equation
where
represents the slope
represents the y-intercept
Converting the equation into the slope-intercept form of the line equation

Add -4x to both sides

simplify

Divide both sides by -1

Simplify

Therefore, 4x - y = - 20 in y=mx+b form is: y = 4x + 20