Y+1=1/3(x−3) (it has to have 2 points)

The intercept method of graphing is quick and easy.

Find the x-intercept by setting y = 0 and solving for x:

y+1=1/3(x−3)   =>   0+1=1/3(x−3)
  Multiply both sides by 3:  3 = x - 3.  Then x = 6, and the x-int. is (6, 0).

Find the y-int by setting x = 0 and solving for y:

y+1=1/3(0−3)
Mult both sides by 3:  3y+3 = -3, so that 3y = -6, and y = -2.
Then the y-intercept is (0,-2).

Plot these 2 points.  Then draw a line thru them.

-3

y2-y1
x2-x1

-6-3
0-3.

-9/-3 = -3