Posted by **g2thez** on Wednesday, November 22, 2006 at 7:18pm.

what is the slope of the points {1,-2}

and {3,-4}

Slope is defined as the change in y divided by the change in x

slope = (y2 -y1)/(x2 - x1)

so then simply substitute the pts corrsesponfing to x1,x2,y1,y1

= (-4--2)/(3-1)

= -1

3x-5y=1

2x+5y=9

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