Which line has a slope of zero?

-Line a

-Line b

-Line c

-Line d

Use the data on the dot plot to answer the question.how many people read for more than three hours last week? i'm on a unit test review

Afootball is throw by a quarterback to a receiver

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 $s$?