To graph the line, you have to determine at least two points of it. First, write the equation in slope-intercept form:
-Subtract 9x to both sides of the equation to pass the term to the right side
-Divide both sides by -3
Choose two values of x, replace them on the formula, and calculate the corresponding values of y, for example, x=0 and x=3
For x=0
The first ordered pair is (0,0)
For x=3
The second ordered pair is (3,9)
Plot both points and graph the line: