Review how to do linear inequalities (Y8 Maths)
Check Y8 maths book
What do open circles on an inequalities number line tell us?s
Open circles EXCLUDES values (displayed as < or >)
What does filled circles on an inequalities number line tell us?
Filled circles INCLUDES values (displayed as <= or >=)
How do u solve an inequality if ‘x’ appears multiple times?
-> split into two inequalities, solve separately
-> combine answers (must have overlap to be valid)
What is a quadratic inequality?
It is an inequality with an x^2 in the equation, they look like parabolas when they are plotted
Can inequalities be represented on graphs?
Yesss!!!
We can represent inequalities on graphs - an alternative to number lines, allows inequalities in ‘y’ and ‘x’ in TWO possible conventions. Pls list the 2 conventions!!!
- HIGHLIGHTING what we DO want to include
- HATCHING (crossing out) what we DON’T want to include
What does a solid line represent in inequalities on graphs?
Solid line INCLUDES values on the line (<= or >=)
What does a dashed line represent in inequalities on graphs?
Dashed line EXCLUDES values on the line (< or >)
What does hatching do to an inequality?
Hatching EXCLUDES one whole side of an inequality
Do practice questions for inequalities on GC/online/DrFrost
Good luck!!!
What is the rule when you multiply or divide inequalities?
- Multiply or dividing is valid by positive numbers only
- If u multiply or divide by a NEGATIVE number, u MUST flip the sign around!!!
What is the rule when u add or subtract in inequalities?
- Adding or subtracting is always valid
Practice solving double inequalities, quadratic inequalities, inequalities on graphs etc. (on GC/notability/DrFrost)
Good luck!!!
Practice solving (double) quadratic inequalities on graphs!!!
Good luck!!!
Practice sketching all kinds of inequalities (on GC/DrFrost)
Good luck!!! You have got this! 🥳🥳❤️❤️
Practice describing the region shown using inequality notation (on GC/DrFrost)
Good luck!!! You have got this! 🥳🥳❤️❤️
