Quick question, I'm learning about inequalities and graphs, so I just have one thing that I forgot. With an underscored < symbol, would the graph have the open dot or closed dot? I forgot to take notes on this. My bad! I think that a < symbol that is not underscored has the open dot. Is that correct?

Answer 1

if it is at the equal point, it includes that point. closed dot
Plotting inequalities. To plot an inequality, such as x>3, on a number line, first draw a circle over the number (e.g., 3). Then if the sign includes equal to (≥ or ≤), fill in the circle. If the sign does not include equal to (> or <), leave the circle unfilled in.

Answer 2

That makes sense, Thanks!