+130081 (-2, 15) ( 9 , - 18)
Slope = [ -18 - 15 ] -33
___________ = ____ = - 3
[ 9 - -2 ] 11
To write the equation using ( -2 , 15) we have
y = slope ( x - x coordinate) + y coordinate
y = -3 ( x - -2 ) + 15 simplify
y = -3 ( x + 2) + 15 subtract 15 from both sides
y - 15 = -3(x + 2)
Note, NSS....either point could have been used....it would have produced a different looking equation....but....when both were simplified, they would be EXACTLY the same.....!!!
Poiint ( 8 , -8) slope 3
y = slope ( x - given x coordinate) + (given y coordinate)
y = 3 ( x - 8) + ( - 8) simplify
y = 3 ( x - 8) - 8 add 8 to both sides
y + 8 = 3 ( x - 8)
