Question

Find the equation of the line passing through points (15,-25) and (12,-11). Write your answer in the form y=mc+b

Answer 1

 

Hello : let  A(15,-25)    B(12,-11)
the slope is :   (YB - YA)/(XB -XA)
(-11+25)/(12-15)  = -14/3
an equation is : y=ax+b     a is a slope

y = (-14/3)x +b

 

the line through point  (12,-11) :  -11 = (-14/3)(12)+b
-11 = -56 +b 

 b = 45
the equation is : y =(-14/3)x+45