单选题If a line is perpendicular to the line 2x + 6y = 18, what is its slope?A-1/3B1/3C-3D3E1/2

单选题
If a line is perpendicular to the line 2x + 6y = 18, what is its slope?
A

-1/3

B

1/3

C

-3

D

3

E

1/2

参考解析

解析：
The slope of the given line 2x + 6y = 18 is -1/3. Perpendicular lines have slopes that are negative reciprocals of each other, so the slope of the line perpendicular to the given line is 3.

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