The equation of a line that passes through (0, 0) is y = x, where the two variables x and y have always the same values.
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Any variables can be shown on a graph.
The vertical line passing through the origin
-2.25
The graph is a straight line, passing through the origin, with a slope equal to the speed of the wave.
to graph in equaltities in two variables, you graph the two numbers and/or variables. then you look at the sign to see if its greater than, less than, greater than or equal to, or less than or equal to and you graph the line as dashed or a solid