What is an inequality?
An inequality is an equation that has two different values which don’t relate. One is bigger or smaller than the other.
For example 5 < -2
The symbols to express greater than or less than are > and <
If you want to say that it’s greater and equal to or less than and equal to the signs are ≥ and ≤
How to graph it:
If we had 5 > x you would put it on a number line
——————-|—————– (5 would go where the line is)
Since the statement is saying 5 is greater than x the arrow would be going to the right
Another thing is that you put a small circle over the line and depending if its greater/ less than or greater/ less than or equal to the circle will either be filled in or not. If it’s greater/ less than or equal to the circle is coloured in.
Tips to help you:
- in inequalities make sure whatever you do to one side of the equation you must do it to the other side
- remember BFSD (Brackets, Fractions, Sort, Divide) this will guarantee the equation will work
- when dividing a number that is negative make sure you flip the signs