Is there a relationship between hyperbola and graph of first order function? What's the difference between a first-order function and an inverse proportion function? Not all of them have y increasing with X or Y decreasing with X. why do we have an inverse proportion function when we have a first-order function? Can't we all use a first-order function?

Is there a relationship between hyperbola and graph of first order function? What's the difference between a first-order function and an inverse proportion function? Not all of them have y increasing with X or Y decreasing with X. why do we have an inverse proportion function when we have a first-order function? Can't we all use a first-order function?

Draw the X-Y image, the first-order function is a straight line, and the inverse proportion function is a hyperbola. When x tends to infinity, the inverse proportion function will approach a certain value, but the first-order function will not