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solve it for y. add 20 to both sides. then divide it by 5 for both sides. if you divide by a negative number, you have to change <= to >= but you dont so you can keep it how it is.
when you solve for y you get 4/5x+4<=y
then you compare it to y=mx+b, where m is your slope, and b is your yintercept
so (0,4) is a point then you rise 4 and run 5
k. you should be able to do the rest of your hw cuz i explained it a lot. aka... im not trying to do all your hw but i will help you.
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