Question

4x-12y=2;(10,-1)
a) y= -1/3x+7
b)y=-1/3x+29
c)y=3x+29
d)y=-3x+29
(10points)

Answer 1

Answer:    [D]:   "  y = -3x + 29  " .
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Explanation:
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Given the solution, "(10, -1)", 
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 Answer choice, "D",   "y = -3x + 29" ; is the only answer choice given that has:  "(10, -1)" as a solution; (that is, when "x = 10; y = -1").
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    Given the equation in the answer choice given in "Answer choice: [D]:
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                →   " y = -3x + 29" ;
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     Let us substitute the "x-coordinate", which is:  "10", for "x"; 
and see if "y = -1" ;
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                →    -3*(10)  +  29 =? -1 ?? ;
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                →         -30   + 29  =? -1 ??  Yes!  
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 So, the answer is:  Answer choice:  [D]:  " y = -3x + 29 " .
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