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Why is a third point needed to graph an equation?
I would not say it is "needed," but basically the more points you have the better you can understand the graph. And three because its the recommmended minimum to get a gist of the graph, yet it will not take a lot of effort to plug in three numbers.
How can you tell whether the graph of three or more points will lie along a straight line?
you should know this
What is the graph of a line with a slope one half that contains the points -6 and 6?
' -6 ' and ' 6 ' are not points. On a 2-dimensional (flat) graph, you need two coordinates to locate one point. (On a 3-dimensional (solid) graph, you need three coordinates to locate one point. And there's no such thing as a 1-dimensional graph.)
Why is it good practice to graph a linear equation by finding and plotting three points instead of two?
In case any of the points has been miscalculated you will not have a straight line - alerting to to the fact that there is a mistake.
What are three types of graph?
Line Graph.... Bar Graph... And some Scattered Dot Graph thing...........
