Graphing Linear Equations in the Coordinate Plane
Graphing Linear Equations
Example
Graphing a linear equation
Graph y = 2x + 1. Plot at least four points.
Solution
If we write y in terms of x, we get y = -2x + 1. Now arbitrarily select four
values for x and calculate the corresponding values for y:
|
x |
-1 |
0 |
1 |
2 |
|
y = -2x + 1 |
3 |
1 |
-1 |
-3 |
Plot these points and draw a line through them as shown in the figure below.
|
