No. 4/x will take the form of a hyperbola and is called an inverse function.
Proportional and linear functions are almost identical in form. The only difference is the addition of the “b” constant to the linear function. Indeed, a proportional relationship is just a linear relationship where b = 0, or to put it another way, where the line passes through the origin (0,0).
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Subtract 7.50 - 4.00 and dived that answer by 10