Question 240680
SLOPE=(-2+7)/(-9+5)=5/-4=-5/4 ANS.
SLOPE=(-12+17)/-1-3)=5/-4=-5/4 ANS.
SLOPE=(-7+12)/(-5+1)=5/-4=-5/4 ANS.
THIS PROVES THAT THESE POINTS FORM A STRAIGHT LINE WITH A SLOPE=-5/4.
Y=mX+b
-2=-5/4*-9+b
-2=45/4+b
-2=11.25+b
b=-2-11.25
b=-13.25 ans. for the y intercept.
Y=-5X/2-13.25 LINE EQUATION.
{{{ graph( 300, 200, -12, 5, -15, 10, -5x/4 -13.25) }}} (graph 300x200 pixels, x from -12 to 5, y from -15 to 10, -5x/4 -13.25) 12