Rewrite the equation 4x + 4y = 20 in slope-intercept form.

4x + 4y = 20

If I'm not mistakened, this is in it's standard form.

Slope intercept form → y = mx + b

Let's transform this into that form.

4x + 4y = 20

4y = - 4x = 20

y = - x + 5

The slope intercept form would be ⇒ y = - 1x + 5