Graphing Linear Equations using Intercepts

You can graph linear equation using different methods. One of the easiest methods to use is the intercepts methods. The intercepts methods require that you know the x and y intercepts of your equation. If you recall from the previous lesson, to find x-int you need to plug in 0 for y in the equation. To find y-int you need to plug in 0 for x in the equation. Once you have your x and y intercept plot them on a coordinate plane. REMEMBER: x-int this is the point where the graph crosses the x-axis, y-int is the point where the graph crosses the y-axis.

Try the Following Example

Graph the following linear equation: 2x +4y = 8
Step 1: Find the x-int (plug in 0 for y)
2x + 4(0) = 8
2x=8
x=4 (x-int=4)

Step 2: Find the y-int (plug in 0 for x)
2(0) + 4y = 8
4y=8
y=2 (y-int=2)

Video: Graphing a line using Intercepts

Video: Graphing a line using slope-intercept

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