Question

what equation represents the line that passes through the point (1,5) and has a slop of -2

Answer 1

first of all, use the gradient formula y2-y1/x2-x1
-1-5/7-1
-6/6= -1
use y-b=m(x-a)
y-5=-1(x-1)
y-5=-x+1
y=-x+6
y=6-x