Hi

Try the ordered pair (x,y) values given for the Points in the Simplest EQ

3x-y = -2

YES(-2,-4),  3(-2)-(-4) = -2

NO!(0,-2),   0 -(-2)  = 2  ≠  -2 

Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!
 .......eq.1

.......eq.2

__________________________





a)



if (,)



.......eq.1



.......eq.1



 ....true; so (,) is a solution for eq.1





.......eq.2











........true; so (,) is a solution for eq.2

__________________________





b)



if (,)







.......eq.1



 ....not true; so (,) is not a solution for eq.1





.......eq.2











........not true; so (,) is not a solution for eq.2

__________________________







A)IS (-2,-4) A SOLUTION?  

B)IS (0,-2) A SOLUTION?   



we will graph both lines and see if given points lie on lines:



first line .......eq.1 we can simplify it dividing both sides by 



.......eq.1 compare to .......eq.2=>



.......eq.2 and we see it's same

that means the two lines are identical (one lies perfectly on top of the other) and intersect at all points of both lines









 

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