Please write a function analytic expression that meets the following two conditions___ ① In the second quadrant, y increases with the increase of X

Please write a function analytic expression that meets the following two conditions___ ① In the second quadrant, y increases with the increase of X

The qualified functions can be linear function, inverse proportion function, quadratic function, such as y = - 2x, y = x + 3, y = - x2 + 5, etc

Write out an analytic expression of a function that meets the following two conditions () 1. Passing through point (2,1) 2, in the second quadrant, y increases with the increase of X

y=-2/X

Please write an analytic expression of the function that meets the following two conditions: 1. Passing through the point (- 2.1) 2. In the second quadrant, y increases with the increase of X

Y = x + 3, passing point (- 2,1);
Y = - 1 / x, x > 0, increasing in the second quadrant;

Known conditions: 1 function image passes through the first quadrant, 2 function image passes through the second quadrant, in each quadrant y decreases with the increase of X

Well, this formula should be more rigorous, that is, y = k △ (x + m) k, M > 0, and X ≠ negative M

When x = 3, the value of function y is less than - 3

y=-x-1
Because y decreases as x increases, K

About functions
Let the length, width and area of the rectangle be a, B and s respectively. When a is constant, the functional relationship between S and B is (s = AB). When s is constant, the functional relationship between B and a is (b = s / a) |. The first blank is s = ab

When a is constant, the functional relation between S and B is (s = AB);
When s is constant, the functional relation between B and a is (b = s / a);
Constant is constant, isn't it? Don't I forget

As shown in the figure, the line y = - 3x + 43 intersects the X axis at point a, and the line y = 33x intersects at point P
(1) Find the coordinates of point p; (2) find the value of s △ OPA; (3) starting from the origin o, the moving point e moves uniformly along the route of O → P → a to point a (E does not coincide with points o and a), and makes the EF ⊥ X axis at f and EB ⊥ Y axis at B respectively through point E. let the coordinates of f be (a, 0) and the overlapping area of rectangular ebof and △ OPA be s. find the functional relationship between S and a

(1) So p (3, 3). (2) 0 = - 3x + 43. X = 4.4 × 3 × 12 = 23. So the area is 23. (3) when e moves on OP, the abscissa of ∵ f is a, so the ordinate of E is 33A, ∵ s = 12 × 33A · a = 36a2. When e moves on PA, the abscissa of