In the standard (x y) coordinate plane what is the slope of a line that is perpendicular
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In the standard (x,y) coordinate plane, what is the slope of a line that is perpendicular to 2x- 3y = 9 ?
A.-3
B.-3/2
C.-2/3
D.2/3
E.3/2
请帮忙给出正确答案和分析,谢谢!
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