You first have to simplify the equation which will get you to y=2x+9
Then you have to graph the equation
Formula:y=mx+b
m = the slope
b = y-intercept
You first start out with the point (0,9) and go up 2 and right 1 or you could do the opposite which would be down 2 and left 1. So some of the points would be (-6,-3) (-5,-1) (-4,1) (-3,3) (-2,5).
And it would form a line
I hope this helped!