What is the slope-intercept equation for the line

y=-1/4x-1

Step-by-step explanation:

Slope of the line is -1/4x

Y-intercept of the line is -1

The perimeter of a rectangle doesn't tell you its dimensions, so there are
an infinite number of different dimensions and different areas it could have
with the same perimeter.  I'm pretty sure there's some more information in
the part of the question that you skipped over before you started copying
the part that you posted.