The coordinate grid shows the cost of different numbers of bookmarks how many cents to four bucks bookmarks cost

If given an equation of a line such as -1/2x+6 how would you create an equation of a line parallel and perpendicula to this line that goes through another point such as (4,10)

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Let hh represent the number of hummingbirds and ss represent the number of sunbirds that must pollinate the colony so it can survive until next year. 6h+4s > 746h+4s> 74 this year, 88 hummingbirds pollinated the colony. what is the least number of sunbirds that must pollinate the colony to ensure that it will survive until next year?