The straight line y = KX + B is parallel to the straight line y = - 2 / 3 * x + 5, and the function expression of the straight line can be obtained by passing through the point a (0, - 3) (1); (2) the straight line can be generated by the straight line The straight line y = KX + B is parallel to the straight line y = - 3 / 2 * x + 5 and passes through point a (0, - 3) (1) Find the function expression of the line; (2) How to translate the line y = - 2 / 3 * x + 5?

The straight line y = KX + B is parallel to the straight line y = - 2 / 3 * x + 5, and the function expression of the straight line can be obtained by passing through the point a (0, - 3) (1); (2) the straight line can be generated by the straight line The straight line y = KX + B is parallel to the straight line y = - 3 / 2 * x + 5 and passes through point a (0, - 3) (1) Find the function expression of the line; (2) How to translate the line y = - 2 / 3 * x + 5?

Because parallel
So the slope k is equal
So k = - 2 / 3
And because of a (0, - 3)
So substitute - 3 = 0 + B
b=-3
The function expression is y = - 2x / 3-3
Translation method: up translation 8 units~

Given the first-order function y = KX + B, when 0 ≤ x ≤ 2, the range of corresponding function value y is - 2 ≤ y ≤ 4, try to find the value of KB

(1) When k > 0, y increases with the increase of X, that is, the first-order function is an increasing function, when x = 0, y = - 2, when x = 2, y = 4, substituting the analytic formula of first-order function y = KX + B to get: B = − 22K + B = 4, the solution is k = 3B = − 2, ｜ KB = 3 × (- 2) = - 6; (2) when k < 0, y decreases with the increase of X, that is, the first-order function is a decreasing function, when x = 0, y = 4, when x = 2, y = - 2, substituting first-order function The analytic formula of function y = KX + B is: B = 42K + B = - 2, the solution is k = - 3B = 4 KB = - 3 × 4 = - 12. So the value of KB is - 6 or - 12

Given the linear function y = KX + B, when - 3 ≤ x ≤ 1, the corresponding value of Y is 1 ≤ y ≤ 9
A. 14b. - 6C. - 6 or 21d. - 6 or 14

It can be divided into two cases: ① passing through (- 3,1) and (1,9) to get: 1 = − 3K + B9 = K + B, the solution is k = 2B = 7, ∥ K · B = 14; ② passing through (- 3,9) and (1,1) to get: 9 = − 3K + B1 = K + B, the solution is k = − 2B = 3, ∥ K · B = - 6, to sum up: K · B = 14 or - 6