Question 254042

what is a open dot or close dot on the graph of an inequality
<pre>Open CIRCLE: {{{highlight_green(matrix(1,11,The, value, at, this, point, is, NOT, included, in, the, solution))}}}
Closed CIRCLE: {{{highlight_green(matrix(1,10,The, value, at, this, point, IS, included, in, the, solution))}}}