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gwd-6-27

27. in the xy-plance, is the slope of line k positive?

(1) line k passes through the points(--1, --7) and (2, 5)

(2) line k has equation y=4x-3

answer: d

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 in geometry, line refers to straight line.

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QUOTE:
以下是引用simbachu在2008-2-21 6:52:00的发言:
with condition one only, what if the line is not a straight one?

how to define the slope of a line not straight

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with condition one only, what if the line is not a straight one?

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line k passes through the points(--1, --7) and (2, 5)得出K的直线方程是y=4x-3

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