Write the equation of a line that contains the point (7, 9) and is parallel to a line that contains the points (-4, 5) and (8, -1).
find the slope between the tw given points (y1-y2) / (x1-x2) = 6/(-12) = m
parallel is the same slope
y = mx +b
y = -1/2 x + b sub in the point to be on the new line
9 = -1/2(7) + b b = 12.5
y = - 1/2x + 12.5