help pls es de mate examen pls
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Explicación paso a paso:
y= ½ x-4 m= ½
mx= ½
y= mxx+5
y=½x+5 .... (9, -6)
-6= 9/2+b
b= -21/2
y= ½x -21/2 <> x -2y -21=0