Answer:
y = 2 x + 6 given line
y = m x + b standard equation for straight line
y = 2 x + b for slope of unknown line to be the same
-1 = 2 (1) + b substitute given vaues
b = -3
y = 2 x - 3 equation of line to be found
slope = 2
if x = 1 and y = -1
-1 = 2 - 3 or 2 = 2
