The image of a certain function passes through the point (- 1,2), and the value of function y decreases with the increase of independent variable x. please write a function relation that meets the above conditions___ ．

The image of a certain function passes through the point (- 1,2), and the value of function y decreases with the increase of independent variable x. please write a function relation that meets the above conditions___ ．

∵ y decreases with the increase of X, ∵ K ＜ 0. And ∵ a straight line crosses a point (- 1,2), ∵ the analytic formula is y = - 2x or y = - x + 1, etc. so the answer is: y = - 2x (the answer is not unique)

Image processing with positive scale function y = 1 / 2x_____ The value of quadrant y decreases with the decrease of X____
If the image with positive scale function y = KX (k is not equal to 0) passes through the point (1 / 3, - 1 / 2), then the image passes through the point______ Quadrant, K=______
If the image with positive scale function y = x / m-2 passes through the second and fourth quadrants, the value range of M is________

1. The value of Y decreases with the decrease of X when the image with positive scale function y = 1 / 2x passes through 1 and 3 quadrants
2. If the image with positive scale function y = KX (k is not equal to 0) passes through points (1 / 3, - 1 / 2), then the image passes through quadrants 2 and 4, k = - 3 / 2
3. If the image with positive scale function y = x / m-2 passes through the second and fourth quadrants, the value range of M is m

For the function y = - 1 / 2x, when x > 0, the image of this part of the function is in the fourth quadrant

You'd better draw a function diagram on the draft paper
But I can also write it to you directly
When x > 0, because y = - 1 / 2x
So y