Question

is it necessary to make graph and or notation when solving inequalities

Answer 1

You may or may not be asked to graph the solution.

Answer 2

did u say correct to my last reply on the last question?

Answer 3

first change inequlity sign and make opposing side of bars opposite +,-
or (then) make inequility sign same and keep opposing side of bars same +,-

Answer 4

I think this is what you meant, so I think you're right.