+0  
 
0
1117
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avatar+90 

A.13x-12y=82 B.-6x=y C.7=y D. y=x2-2

 

Which of the following equations is not linear 

Show how

 Jan 31, 2017

Best Answer 

 #1
avatar+36916 
+5

A,B,C are all liear and can be put into the line form of  y= mx+b 

D is a quadratic...a parabola because of the exponent

 Jan 31, 2017
 #1
avatar+36916 
+5
Best Answer

A,B,C are all liear and can be put into the line form of  y= mx+b 

D is a quadratic...a parabola because of the exponent

ElectricPavlov Jan 31, 2017
 #2
avatar+90 
+5

@ElectricPavlov But may show your work why D isnt linear

 Jan 31, 2017
 #3
avatar+36916 
0

Then you will have to graph it    or show that it cannot be put into   y= mx+b form

ElectricPavlov  Jan 31, 2017
 #4
avatar+90 
0

@ElectricPavlov Can Ax+By=C show how its not linear?

 Jan 31, 2017
 #5
avatar+36916 
0

yes    ax +by = c is just another form of y = mx + b  equation for a line     Good call!

ElectricPavlov  Feb 1, 2017
 #6
avatar+128598 
0

Here's a way to show that x^2 - 2  is not linear

 

Let x  = 0  ....then (0)^2 - 2  = -2

 

And

 

Let x  = 2  ....then (2)^2 - 2  = 2

 

And

 

Let x  = -2  ....then (-2)^2 - 2  = 2

 

So the points  (0, -2), ( 2, 2) and (-2,2)  are on the graph

 

Now the slope between the frist two points  =  2 while the slope beween the second and third point = 0.......but....the slope beween any two points on a line is always  the same

 

Thus, x^2 - 2 cannot be linear......

 

 

cool cool cool

 Feb 1, 2017

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