Question

Which number line represents the solution set for the inequality 3x<-9

Answer 1

The answer would be the 3rd number line or "C"

Answer 2

The graph in the attached figure

Explanation:

we have

`3x < -9`

solve for x

Divide by
`3` both sides

`3x/3 < -9/3`

`x < -3`

The solution is the interval------>
`(-infinite, -3)` -

All real numbers less than
`-3`

In a number line the solution is the shaded area to the left of the dashed line (open circle)

see the attached figure