Plotting Linear Graphs

1
Plotting Linear Graphs
What type of graph is 3x 2y 12?
Straight Line Graph

• How many points do you need to draw a straight
  line?

2
The easiest points to find are when x 0 and y
0
3x 2y 12
When x 0,
(3 x 0) 2y 12 2y 12
y 6
When y 0,
3x (2 x 0) 12 3x 12
x 4
Therefore, (0, 6) is a point on the line
Therefore, (4, 0) is a point on the line