If every point on the line is "translated 2 units to the left", (0, 4) is translated to (-2, 4) and (-5, 0) is translated to (-7, 0). You are told that the equation is of the form "y= (4/5)x+ k" so a simple way to find k is to put either x= -2 and y= 4 or x= -7, y= 0 into that equation and solve for k.