Given that the real numbers x and y satisfy the equation x + 2Y = 6, when 1 ≤ x ≤ 3, the value range of Y − 1 x − 2 is obtained

Given that the real numbers x and y satisfy the equation x + 2Y = 6, when 1 ≤ x ≤ 3, the value range of Y − 1 x − 2 is obtained

According to the meaning of the question, draw a figure, as shown in the figure; ∵ y − 1x − 2 is the slope value of the line connecting a moving point of line AB on the line x + 2Y = 6 and point C (2,1); ∵ a (1,52), B (3,32), ∵ the slope of line BC is KBC = 1 − 322 − 3 = 12, the slope of line AC is KC = 1 − 522 − 1 = - 32, ∵ y − 1