The slope of the line is 2/3
To find the slope of the line, first choose two points that are on the line. For this example we'll use (0, -4) and (6, 0). Now use the slope formula with these two points to find the slope.
m(slope) = (y2 - y1)/(x2 - x1)
m = (0 - -4)/(6 - 0)
m = (0 + 4)/(6 - 0)
m = 4/6
m = 2/3