It is known that the straight line is parallel to the straight line y = - 3x + 4, and the intersection point with the straight line y = 2x-6 is on the x-axis. The analytic formula of this function is obtained It is known that the line y = KX + B is parallel to the line y = - 3x + 4, and the intersection point of the line y = 2x-6 is on the x-axis, and the analytic formula of this function is obtained

It is known that the straight line is parallel to the straight line y = - 3x + 4, and the intersection point with the straight line y = 2x-6 is on the x-axis. The analytic formula of this function is obtained It is known that the line y = KX + B is parallel to the line y = - 3x + 4, and the intersection point of the line y = 2x-6 is on the x-axis, and the analytic formula of this function is obtained

The first order function is y = KX + B
∵ parallel to the line y = - 3x + 4
∴k=-3
The intersection point of y = 2x-6 and X axis is calculated as (3,0)
Substituting y = - 3x + B
B = 9
Therefore, the analytic formula of the first order function is
y=-3x+9

When k is the value, the intersection point of 2K + 1 = 5x + 4Y and K = 2x + 3Y is in the fourth quadrant?

From the meaning of the title
5x+4y=2k+1
2x+3y=k.
The solution
x=2k+3
Seven
y=k-2
Seven
Because the intersection of the two lines is in the fourth quadrant, x > 0, y < 0,
Namely
2k+3
7>0
K-2
7<0.
The solution
k>-3
Two
k<2.
Therefore: - 3
When 2 < K < 2, the intersection of two straight lines is in the fourth quadrant

With the first degree function and the binary equation (system) related! The solution of the univariate linear equation 3x-1 = 2x + 5 is a linear function_________ The abscissa of the intersection with the X axis is also a straight line___________ And straight line___________ Abscissa of the intersection point

To change the equation into the general form ax + B = 0 X-6 = 0 is the value of X when y is equal to 0 (intersection with X axis)
It can also be regarded as the abscissa of the intersection point of two first-order functions 3x-1 = y 2x + 5 = y
3x-1 = 2x + 5, the value of X can be solved)

When a unit wants to print a batch of publicity materials for the Guangzhou Asian Games, on the premise of paying 600 yuan for plate making fee and 0.3 yuan for each material, Party A and Party B put forward different preferential conditions, and a printing factory proposed that if the printing quantity exceeds 2000 copies, the printing fee of the excess part can be charged at a 10% discount; if the printing quantity exceeds 3000 copies, the printing fee will be reduced by 10%, More than part of the printing fee can be charged by 20% (1) If the unit wants to print 2400 copies, the cost of printing plant a is ˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍˍ; (2) According to the quantity of printing, please discuss which printing factory the unit will get more discount

The cost of factory a = 600 + 2000 * 0.3 + (2400-2000) * 0.3 * 0.9 = 1308 yuan;
The cost of factory B = 600 + 2400 * 0.3 = 1320
If x (x > 2000) copies are printed, the cost of the two teams is equal
600 + 2000 * 0.3 + (x-2000) * 0.3 * 0.9 = 600 + 3000 * 0.3 + (x-3000) * 0.3 * 0.8, x = 4000
When x < 2000, the cost to Party A and Party B is the same;
When 2000 ＜ x ＜ 4000, more preferential treatment can be obtained in factory a;
When x > 4000, you can get a greater discount to factory B

Make the image of the function y = - 4x + 3, and answer the following questions with the image: (1) in this function, with the increase of X, y Increase or decrease? (2) When x takes what value, y = 0? When x takes what value, Y > 0? When x takes what value, y < 0? (3) The area of a triangle enclosed by an image and its axis Tomorrow Brothers, sisters, uncles and aunts

1. Decrease
2. Y = 0 for 3 / 4, Y > 0 for less than 3 / 4 and Y < 0 for greater than 3 / 4
3、S＝3×3/4÷2＝9/8

Given that the image of a function of degree y = - 2 / X intersects the point (- 1, m) and passes through the point (0,1), the analytic formula of the function of degree one is obtained

y=-x+1

The positive proportion function y = 2x and the first order function y = ax + B pass through point a (1, m), and the first order function image intersects X axis at point B (4,0) Find the relation of function of degree one

y=-2／3x+8／3

As shown in the figure, it is the first order function y = KX + B and the inverse proportional function y = 2 The graph of X, then the equation KX + B = 2 The solution of X is () A. x1=1，x2=2 B. x1=-2，x2=-1 C. x1=1，x2=-2 D. x1=2，x2=-1

It can be seen from the graph that the coordinates of the intersection point of the two function images are (1,2); (- 2, - 1);
Then the two abscissa are 1 and - 2,
∵ the coordinates of the intersection point of the function conform to the analytic formula of the two functions,
The coordinate of the intersection point of the function is the solution of the system of equations,
Ψ x = 1 or x = - 2,
Therefore, C

Given that the image of the first order function y = KX + m passes through point a (0,1), and K = B + C / a = a + C / b = a + B / C, the expression of the first order function is obtained

Because k = B + C / a = a + C / b = a + B / C
So AK = B + C, BK = a + C, CK = a + B
So (a + B + C) k = 2 (a + B + C)
So the first case: a + B + C ≠ 0, so k = 2, so y = 2x + 1
A + B + C = 0, so k = (B + C) / a = - A / a = - 1, so y = - x + 1

Given that the image of the first order function y = KX + m passes through point a (0,1), and K = B + C / a = a + C / b = a + B / C, the expression of this linear function is obtained

The image of the first order function y = KX + m passes through the point a (0,1) M = 1K = B + C / a B + C = AK (1) k = a + C / b a + C = BK (2) k = a + B / C A + B = CK (3) (1) + (2) + (3), then K (a + B + C) = 2 (a + B + C) if (a + B + C) ≠ 0 K = 2 if (a + B + C) = 0 B + C = - a k = B + C / a = - 1, the expression of the first order function is obtained