Y=1/x
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A linear equation represents a line. A linear inequality represents part of the space on one side (or the other) of the line defined by the corresponding equation.
Linear has a slope direct does not but both go through the orgin
Direct variation means that a linear function can be written as y = kx. The y-intercept must be (0, 0). The constant, k, is the slope.
if the line runs through the origin it is a direct variation no matter if it is increasing or decreasing
slope