Represent the following inequations on number line
(a) `x le 3`
(b) `y ge -1`
(c) `z lt -4`

Explanation

(a) In the figure above, the ray drawn above the number line represents the solution set of the inequation. The end point of the ray is a part of the solution set. This is indicated by placing a solid dot at the end point

(b) In the figure above, the ray drawn above the number line represents the solution set of the inequation. The end point of the ray is a part of the solution set. This is indicated by placing a solid dot at the end point

(c) The ray drawn above the number line represents the solution set of the given inequation. The end point of the ray is not a part of the solution set. This is indicated by placing a hollow dot at the end point. We see that the graph of an inequality in one variable is a ray