You do not connect the dots on a graph when the data points are discrete and not continuous. In other words, when the values represent distinct and unrelated data points rather than a continuous sequence. Connecting the dots in such cases would imply a relationship or trend between the points that does not exist. It is important to consider the nature of the data being represented to determine whether connecting the dots is appropriate.
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wow. line graph.
y=-x Draw a straight line with slope -1 passing through (0,0). Or, plot (x,y) coordinates that satisfy the equation, and connect the dots.
When the data on the graph is continuous,it does make sense to connect the points on the graph of 2 related variables.
It depends on what you are trying to do.
y=2X+2 y=mX+b b = y intercept. This means the intercept of this graph is 2. plot a point at (0,2) this is where the graph starts m = slope. so the slope of this line is 2. start at the point (0,2) and count up 2 units, over 1. up two, over one. then connect the dots, and there ya go! :)