If the area of the triangle formed by the image of the first-order function y = - 2x + B and the two coordinate axes is 9, then B=______ ．

If the area of the triangle formed by the image of the first-order function y = - 2x + B and the two coordinate axes is 9, then B=______ ．

The intersection coordinates of the line y = - 2x + B and the X axis are (B2, 0), and the intersection coordinates of the line y axis are (0, b). According to the area of the triangle is 9, we get 12 | B2 | · | B | = 9, that is, B24 = 9, and the solution is m = ± 6. So the answer is: ± 6

If the area of the triangle formed by the image of the first-order function y = - 2x + B and the two coordinate axes is 9, then B=______ ．

The intersection coordinates of the line y = - 2x + B and the X axis are (B2, 0), and the intersection coordinates of the line y axis are (0, b). According to the area of the triangle is 9, we get 12 | B2 | · | B | = 9, that is, B24 = 9, and the solution is m = ± 6. So the answer is: ± 6

If the area of the triangle formed by the line y = - 2x + K and the two coordinate axes is 9, find the value of K

The solution consists of a straight line y = - 2x + K
We know that when x = 0, y = k, that is, the line intersects the Y axis at the point (0, K)
When y = 0, x = K / 2, that is, the intersection of the line and x-axis is (K / 2,0)
And the area of the triangle formed by the line y = - 2x + K and the two coordinate axes
That is, 1 / 2 × / K / × / K / 2 / = 9
That is / K / ^ 2 = 36
The solution is k = ± 6