The analytical formula of the line y = 2x with respect to the x-axis symmetry is () the analytical formula of the line y = 2x + 4 with respect to the x-axis symmetry is ()

The analytical formula of the line y = 2x with respect to the x-axis symmetry is () the analytical formula of the line y = 2x + 4 with respect to the x-axis symmetry is ()

The analytic formula of the line y = 2x with respect to X-axis symmetry is (y = - 2x)
The analytic formula of the line y = 2x + 4 with respect to X-axis symmetry is (y = - 2X-4)

Let's know the line y = 2x-1. (1) find the analytic formula of the line with respect to X-axis symmetry. (2) plane the line y = 2x-1 to the left
The known straight line y = 2x-1
(1) Find his analytical formula of a straight line with respect to X-axis symmetry
(2) Translate the line y = 2x - 1 to the left by 3 units, and find the analytical expression of the line after translation
(3) The line y = 2x - 1 is rotated 90 ° clockwise around the far point to obtain the analytical formula of the line after rotation

(1) The intersection coordinates of y = 2x-1 and two coordinate axes are (0, - 1) and (1 / 2,0) respectively. The point coordinates of these two points about X-axis symmetry are: (0,1) and (1 / 2,0). These two points must be on the line. Therefore, according to the two-point formula, the analytic formula can be obtained as follows: y = - 2x + 1 (2) translate the line y = 2x-1 to the left 3

Finding the analytic expression of the line y = X-1 with respect to the x-axis symmetry

The coordinate change of x-axis symmetric point is abscissa invariant, and the ordinate is opposite to each other, so the analytical formula of line y = X-1 about X-axis symmetry is - y = X-1, that is y = - x + 1