If the point P (- A, 3a) is on the image of function y = - 2x + 3, find the value of a, and judge whether the reflection point P of point P about X axis is also on the image of function y = - 2x + 3 or on the image of function y = 2x-3?

If the point P (- A, 3a) is on the image of function y = - 2x + 3, find the value of a, and judge whether the reflection point P of point P about X axis is also on the image of function y = - 2x + 3 or on the image of function y = 2x-3?

3a=-2*(-a)+3=2a+3
a=3
P(-3,9)
The reflection point degree p (- 3, - 9) of P about X axis
Y=-2*(-3)+3=9
Y=2*(-3)+3=-3
None of them are here

It is known that the area bounded by the image and the two axes of the function y = b-2x is 4
(1) Finding the value of B
(2) Find out the intersection coordinates of the line and X axis, Y axis
(3) When x takes what value, y is greater than 0

b=±4；
(2,0), (0,4) or (- 2,0), (0, - 4)
When B = 4, x < 2, Y > 0;
When B = - 4, X is less than - 2 and Y is greater than 0
(the combination of number and shape can be discussed by classification.)

Function y = ax ^ 2 + BX + C, the coordinates of the intersection of the image and the X axis are (- 3,0), (1,0), and the intercept on the Y axis is 6
(1) (2) what is the value of X when y > 0
(3) Monotone increasing interval of function (4) maximum (or minimum) of function
Please give me some advice,

This is very simple:
1. Let y = a (x + 3) (x-1)
When x = 0, y = 6
A = - 2
The expression is y = - 2x ^ 2-4 * x + 6;
2.y=-2(x+3)(x-1);
When x belongs to (- 3,1), Y > 0
3. The axis of symmetry is x = - 1
The parabola opens downward and is an increasing function on (- infinity, - 1)
4. The function has a maximum value and no minimum value. The maximum value is at the axis of symmetry
When x = - 1, the maximum value is y = 8
Can you see the answer?

If the image of the first-order function and the positive scale function y = - 5 / 2x is parallel, and the abscissa of the intersection point with the X axis is 5, find its intercept on the Y axis

If parallel, the coefficient of X is equal
So y = - 2x / 5 + B
And x = 5, y = 0
So 0 = - 2 + B
b=2
y=-2x/5+2

How to calculate slope and intercept

The equation is reduced to y = KX + B, where k is the slope and B is the intercept

What is the formula for calculating the slope and intercept of the standard curve?
I only remember the calculation formula of correlation coefficient, but I forget the calculation method of a and B. I don't want to do the calculation method of graph which is completely formula!
Is the chemical analysis of standard samples, made of standard curve series, there is a formula is to find a and B calculation method, hope the relevant industry to do the next detailed explanation!

The slope is derived from the function expression. The intercept on the Y axis is the value of y when x = 0, and the intercept on the X axis is the value of X when y is 0

Standard curve slope calculation?
Y-axis (unit: 10-3 power)
There are the following data: 0 24 6 8 10 12 14 16
The x-axis has the following data: (no unit)
0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
For this standard curve: slope, the best regression curve is also calculated, trouble, for work, ah, please senior people to answer!

Man, it's a standard linear problem. As for that?
The linear regression curve is y = 0.10x
The slope is 0.10

How to calculate the slope and intercept of a quadratic equation with one variable?

Do quadratic equations of one variable have slopes and intercepts? I only know that quadratic equations of two variables have slopes and intercepts
The second power of one variable is a parabola
Binary linear equation, for example: ax + by + C = 0, then the slope is - A / B, the intercept on Y axis is - C / B, and the intercept on X axis is - C / A

What are the intercept and slope in linear programming?

Here, it generally refers to the intercept on the y-axis, that is, the ordinate of the intersection of the line and the y-axis. The objective function is: z = ax + by; when b > 0, the maximum longitudinal intercept means the maximum function; when b > 0, the maximum longitudinal intercept means the maximum function

How to display the slope, intercept, correlation coefficient and other parameters after the curve is fitted linearly? How to get these parameters onto the graph?

This writing can be done in Excel, which is very convenient. After you input the data, you can insert the point into the scatter diagram, and a scatter diagram will appear. Then right click any point and select Add trend line. In the pop-up box, you can check the slope, intercept, correlation coefficient and other parameters