Kemiringan garis yg melui titik (4,h) &(h+3,7) kemiringan -1/4

m = (y2- y1)/(x2-x1)
-1/4 = (7-h) / (h+3-4)
-1/4 = (7-h)/ (h-1)
-1/4(h-1) = (7-h)
-1/4h + 1/4 = 7-h
3/4 h = 7-1/4
3/4 h=27/4
h= 27/4  x  4/3
h = 9

[tex]m= \frac{ y_{2}- y_{1} }{ x_{2} - x_{1} } \\ - \frac{1}{4} = \frac{7-h}{h+3-4} \\ - \frac{1}{4} = \frac{7-h}{h-1} \\ 4(7-h)=-1(h-1) \\ 28-4h=-h+1 \\ -4h+h=1-28 \\ -3h=-27 \\ h= \frac{-27}{-3} =9[/tex]