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Using slope concept , determine whether ...

Using slope concept , determine whether R(1,-4), S(-2,2)
and T(-3,4) are collinear or not .

Text Solution

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`R(1,-4),S(-2,2)` and `T(-3,4)`
Slope of line `RS=(2-(-4))/(-2-1)`
`=(2+4)/(-3)`
`=6/(-3)=-2`
Slope of line `ST=(4-2)/(-3-(-2))`
`=2/(-1)=-2`
Slope of line `RS=` slope of the line ST and LS is the common point.
`:.` points R,S and T are collinear.
Points `R(1,-4),S(-2,2)` and `T(-3,4)` are coollinear.
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