Question 493238: Hi I need to know how to graph numbers in inequalities
Answer by Flannery(124)   (Show Source):
You can put this solution on YOUR website! Say you want to graph x>4.
You plot 4 on your number line and draw a line extending up the number line with an arrow on the end pointing to infinity. When you plot 4 use an empty dot, a little circle.
If x is greater than or equal to 4, have a filled in dot at 4 and the line with the arrow pointing up the line.
Do you need to graph a compound inequality?
Say x > 4 and x < 6
Plot 4 with line and an arrow up the line and 6 with a line and an arrow down the line.
Again, use the little circle to plot the numbers on the line. Draw the line between 4 and 6 a bit heavy on the paper so your teacher can tell that section from the rest of the number line.
If you want to graph 4 < x or 6 > x, plot 4 with an arrow pointing down and 6 with an arrow pointing up the number line.
Just remember, fill in the dot if there's an "or equal to" in the inequality but not if its just < or >.
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