2.8 X 10^-8 (........characters space so that I can post this..)
parenthesis first -3-11.5
then subtract so your answer is -14.5
Find the gradient so (-5-3)/(2+1) =-8/3 input it in y=mx+c and also use the coordinates from the question
So it becomes
3=-8/3 (-1) + c
C=1/3
Y=-8/3 x+1/3
