Question

#2

Answer 1

if signs is <= that means it is solid line

so less than means the shading is going to be below

Answer 2

its all to confusing to me

Answer 3

first, when dealing with inequality and graphing the sign is important
<
>
are dotted lines
if it is greater/less than or equal to it is a solid line

Answer 4

Option C based on rationale above.