A fractional function (inverse proportionality) is a function of the form y=k/x, and k≠0.
The graph is a hyperbola that does not intersect any axis of coordinates, although it is infinitely close to them.
The domain and scope of values are all valid numbers.
The function decreases at k>0 and increases at k<0.
A special case — k=1, then the function takes the form y=1/x. If k>0, the branches of the hyperbola are located in the I and III coordinate quarters. If k<0 – in the II and IV coordinate quarters.
Example fraction function graph:
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