Which of the following ordered pairs is a solution of x + 1/2 y = 1
(-2, 6)
(2, -6)
(-2, -6)

The answer is:  [A]:  " (-2, 6) " .

Note:  The equation is:  " x + (1/2) y = 1 " .

Choice A:  (-2, 6).    " -2 + (1/2)*6 =? 1  ?
                              -2 + 3 = 3 − 2 = 1 .  Yes!

Choice B:  (2, 6).  "2 + (1/2)*(-6)  =? 1 ? " ; 
                           2 + (-3) = 2 − 3 = -1 ; NOT "1" ; so rule out choice "B" .

Choice C:  (-2, -6).  "-2 + (1/2)*-6 =? 1 ? " ;
                     -2 + (-3) = -2 − 3 = -5 ; NOT "1" ; so rule out choice "C".

The answer is:  Answer choice:  [A]:  " (-2, 6) " .
 

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