I have a confusion about this. But, in my opinion predicter model should expressed as dashed line.
A dashed/dotted line if it is > or <. Otherwise use a regular line. Also shading is required.
line graph
You can use a bar graph or a line graph.
you would use a line graph
Gay
You do not use a line graph if the data is not over time. If it just shows an amount or percentage, you would use it.
line or bar graph
You want to use a line graph whenever you need to plot constant data
You would use a broken bar graph, when grouping and gathering information. You would use straight, slanted, or vertical lines and showing points with dots. A broken bar graph is just like a line graph.
Line graph
To graph an inequality in two variables, first graph the corresponding linear equation as if it were an equality. Use a dashed line if the inequality is strict (e.g., < or >) to indicate that points on the line are not included, or a solid line for non-strict inequalities (e.g., ≤ or ≥). Next, determine which side of the line to shade by selecting a test point not on the line (commonly the origin) and checking if it satisfies the inequality. Shade the region that includes all solutions to the inequality.
You usually want to use a bar graph. If you have a year of data you probably want to use a line graph.