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lperkows
 2 years ago
Best ResponseYou've already chosen the best response.1#2 is correct. You know this because when you solve for y, the x's have the same slope.

virtus
 2 years ago
Best ResponseYou've already chosen the best response.2y=mx+b where "m" is the gradient < marmar i hope you are familiar with this equation. so for 2y =22x, you agree that it can be written as 2y=2x+2, and after you factorise/simplify(ie divide everything by 2) it will look like y =x+1 does this look familiar to the form y= mx+b, hence we may deduce that m= 1 if we then look at the options they offer for the SECOND one 1x 4 =1y do you agree that this is the same as writing 1y= 1x +4 thus "m" =1 which is the SAME for 2y =22x for the THIRD one, 2y 4 =x, you agree this is the same as y =(x/2)+(4/2) where "m" = 1/2 which is NOT THE SAME for 2y =22x for the FOURTH one, 2y 3 =2x, you agree this is the same as writing y=(2x/2) +(3/2), thus "m" =1 which is NOT THE SAME for 2y =22x therefore, it is true for only the SECOND ONE. and because it is true for the SECOND ONE we may dismiss the FIRST ONE which is "None of them" as a possible answer. so the final answer is the SECOND ONE. i hope this makes sense

Prebz
 2 years ago
Best ResponseYou've already chosen the best response.0http://www.wolframalpha.com/input/?i=2x%2B2y%3D2+and+x4%3Dy+and+2x%3Dy%2B4+and+2y4%3Dx+and+2y3%3D2x Here's a (hopefully) easy visualization of the problem.
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