Answer :
the slope of an equation passing though the points (x1,y1) and (x2,y2) is
(y2-y1)/(x2-x1)
(4,-7) and (9,1)
slope=(1-(-7))/(9-4)=(1+7)/5=8/5
slope=8/5
(y2-y1)/(x2-x1)
(4,-7) and (9,1)
slope=(1-(-7))/(9-4)=(1+7)/5=8/5
slope=8/5