Two measures are proportional if both are zero at the same time, and increases of the same amount one are accompanied by increase of equal amounts in the other. Algebraically, Y = cX where c is some fixed number, called the constant of proportionality.
Two variables W and Z are inversely proportional if W*Z = k for some fixed number - also called the constant of proportionality. The relationship may also be written as W = k/Z.
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y is inversely proportional to x if it is proportional to 1/x.
~the function is most likely inversely proportional. ~more input results in less output.
If you mean: y=7x -3 then it is a proportional relationship of a straight line equation.
The graph doesn't intersect either axis.