Question

solve the inequality and graph the solution.
1 ≤ (b - 1)/3
plot the endpoints. select an endpoint to change it from closed to open. select the middle of the segment, ray, or line to delete it.

Explanation:

Step1: Multiply both sides by 3

$1\times3\leq\frac{b - 1}{3}\times3$
$3\leq b - 1$

Step2: Add 1 to both sides

$3+1\leq b-1 + 1$
$4\leq b$

Answer:

The solution of the inequality is $b\geq4$. On the number - line, we put a closed circle at 4 (since the inequality includes equality) and draw a ray to the right of 4.