Jawabanmu

2014-08-26T19:48:01+07:00
 y2 - y1/ x2 - x1 = 8-4/ 5- (-1) = 4/6 = 2/3
2014-08-26T19:48:27+07:00
Diketahui x1 = -1 ; y1 = 4 ; x2 = 5 ; y2 = 8
Ditanya gradien, maka dipakai rumus :
y2-y1 : x2-x1
=> 8-4 : 5- (-1)
=> 4 : 6 = 2/3