GWD3-19

由 **Emilyh** » 2006-09-01 10:53

The graph of which of the following equations is a straight line that is parallel to line l in the figure above?

A. 3y – 2x = 0
B. 3y + 2x = 0
C. 3y + 2x = 6
D. 2y – 3x = 6
E. 2y + 3x = -6

Ans:A

請教這題如何解?

謝謝

由 **FrankChang** » 2006-09-01 11:27

Line 1的slope=2/3,slope與它相等就是平行,
把各選項整理為直線標準式y=mx+c,
A.y=(2/3)x即為所求

由 **Emilyh** » 2006-09-03 16:34

了解了，
謝謝

GWD3-19

GWD3-19

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