Answers are
x intercept (9, 0) and y intercept (0, 3)
Equation in y intercept form is
y = -1/3x + 3
Step by step
x + 3y = 9
Change this into y intercept form
3y = -1x + 9
Divide both sides by 3 to isolate y
3/3 y = -1/3x + 9/3
y = -1/3x + 3 is your equation
Your points to graph
Using your original equation
x + 3y = 9
Substitute 0 for x and solve for y intercept
0 +3y = 9
Divide both sides by 3
Y = 3
Substitute 0 for y and solve for x intercept
X + (3)(0) = 9
X = 9
You now have points to graph
(9, 0) and (0, 3)
Graph is attached