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Slope problem

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Slope problem

by moneyman » Sun Sep 30, 2007 5:57 am
The y intercept of a line l is 4.If the slope of l is negative,which of the following could be the x intercept of l??

(I) -1
(II) 0
(III) 6
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by samirpandeyit62 » Sun Sep 30, 2007 9:49 am
slope will be -ve only if x intercept is 6
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by moneyman » Mon Oct 01, 2007 12:41 am
I know what the anser is...An explanation would rather be helpful..
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by samirpandeyit62 » Mon Oct 01, 2007 12:54 am
to find the slope u need two pts on the line

at y intercept x=0 so pt is (0,4)

at x intercept y=0 so pt would be (-1,0), (0,0) {not possible} or (6,0)

now slope = diff of y /diff of x

will be -ve only if pts are (0,4), (6,0)
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