The concept of inverse proportion function~ We know the general form of y = K / X inverse scale function. Then, y = K / 2x is also an inverse scale function. In the inverse scale function of y = K / 2x, if you know that point a (5,6) is on the function image, you need to substitute the coordinates of point a into the function. At this time, is y = 6, x = 5 or 2x = 5?

The concept of inverse proportion function~ We know the general form of y = K / X inverse scale function. Then, y = K / 2x is also an inverse scale function. In the inverse scale function of y = K / 2x, if you know that point a (5,6) is on the function image, you need to substitute the coordinates of point a into the function. At this time, is y = 6, x = 5 or 2x = 5?

Let's say that the equation y = K / 2x can be transformed into y = 0.5k/x, and because point a (5,6) is on the function image, if y = 0.5k/x is brought in, then 6 = 0.5k/5, k = 60. Understand?