(a) If A(4,0), B(2,2) and C(-2,k) are collinear, find the value of k.
(b) Find the equation of the straight line with slope 2 passing through C.
thanks a lot.
f.5 math 急!!!!
2011-10-10 5:52 am
回答 (2)
2011-10-10 5:55 am
✔ 最佳答案
a.(2-0)/(2-4) = (k-0)/(-2-4)
2/(-2) = k/(-6)
-1 = -k/6
k = 6
b.
Slope required = 2
y - 6 = 2(x+2)
y = 2x + 8
2011-10-09 22:21:30 補充：
Oooops ths for reminder
y - 6 = 2(x+2)
y - 6 = 2x + 4
y = 2x + 4 + 6
y = 2x + 10
參考: Hope the solution can help you^^”
2011-10-10 6:02 am
The equation of part (b) should be : y = 2x + 10
收錄日期: 2021-04-13 18:17:35
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