First, you have to get the equation to the normal form of a line. To do this, you divide both sides by -6 to get

. The y-intercept is at -4 and your slope is 2/3. Use this to graph the equation.
divide 63 by9
63 / 9 = 7
each piece is 7 meters long
The opposite of square root is simply square, so try squaring both sides and use algebra