x=3 means that the x variable always stays constant, so the y variable can change as much as it wants, but x will always be 3.
on a graph, this would like a vertical line. (It should be perpendicular to the x variable's line...if that helps a visual:P)
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The graph of the equation [ x = -3 ] is a straight vertical line, passingthrough the point [ x = -3 ] on the x-axis. Its slope is infinite.
Yes, it is a linear equation with no slope. The graph is a straight line (parallel to the x-axis) that passes through the y-axis, at {0,-3}
y = x - 3The graph is a straight line, passing through the point [ y = -3 ] on the y-axis,and having a slope of [ 1 ].