What is the slope of the line with equation y=-x?
a. the slope is undefined
b.1
c.-1
d.0
if you get the right answer is will name you the brainest so

Can someone explain the elimination method to me for this problem?

Out of $20$ creepy-crawly creatures in a room, $80\%$ are flies and $20\%$ are spiders. if $s\%$ of the total legs belong to spiders, what is $s$?

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3