The linear equation of y = 2x with respect to X-axis symmetry is______ ．

The linear equation of y = 2x with respect to X-axis symmetry is______ ．

From the line y = 2x, we can know that: the slope of the line is 2, the intercept on the Y axis is 0 ∵ the line y = 2x is symmetric about the X axis ∵ the slope of the symmetric line is - 2, the intercept is 0, so the equation of the line y = 2X about the X axis symmetry is y = - 2x, so the answer is: y = - 2x

It is known that two straight lines L1 and L2 are symmetric about X axis, and the solution of L1 is y = 2x + 2, so the solution of L2 is obtained

Find two points on L1, such as (1,2) (0.1)
Find the symmetric point about X. find the analytic expression of the equations

As shown in the figure, given two straight lines y = - 23x + 3 and y = 2x - 1, find the area of the triangle formed by them and Y axis

According to the picture, we can see a (O, 3), B (0, - 1). From the meaning of the question, we get y = - 23x + 3Y = 2x − 1, and the solution is x = 32y = 2. The area of intersection C (32,2), △ ABC = 4 × 32 △ 2 = 3. A: the area of triangle is 3