The Student Room Group

How to draw 2x+y<=1?

Very simple but I just can't get the hang of inequality graphs!

Any help is appreciated :smile:
Reply 1
you change it to y<=1-2x
and then drawing it is just how you would for y=1-2x except you are only concerned with the region below the line.
So the line intersects at 1 and has a gradient of -2
at least i think thats right. Havent done c1 in 2 years :smile:
Reply 2
Original post by bssjonny
at least i think thats right. Havent done c1 in 2 years :smile:


That's right. You're looking for all values for y that are <= 1-2x. :biggrin:
Original post by Dorkins
That's right. You're looking for all values for y that are <= 1-2x. :biggrin:


so what i need to do is shade in the entire area below the line?
Reply 4
Original post by Super Mario 64
so what i need to do is shade in the entire area below the line?


Yep.

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