3,2, 1.a,b. (3b- 1)/2
The independent variable is the initial variable. This function describes the correspondence between each input value and a unique output value. The function value is the value of the function dependent variable y.
2.d (because y corresponding to x has two values)
Example 3. D (because x corresponds to y with two values)
123. 124
One, three, four. Two three four
Example 1
y=-2x+3,y=0,x=3/2。
y=x-3,y=0,x=3
2x+3=x-3,x=2,y=- 1
1/2x(3-3/2)x 1=3/4
Example 2
( 1) x=-4,y=-2x(-4)-6=2。 xy=-2x^2-6x=-2? X=(-3+/- radical sign 13)/2 {if y=-2, the value of x should be -2x-6 =-2 and X =-2}.
(2)?
(3) It seems that the title is typed wrong.
-4 & lt; =-2x-6 & lt; =2,-4 & lt; = x & lt=- 1
D (the inverse proportional function can also be linear)
I think it's 2?
B
A
D
D
A
(0,-3)
y= 1/2x
m & lt=0
k=- 1,b= 1
y=-2/3x
four
(3/2,0) (0, -3) One, three, four, increase.
4,< Four
32/5, 49
y=-x+ 1
y=-x+2
y=-5x+500,0 & lt= x & lt= 100
( 1)S=40-4x
(2)0 & lt; x & lt 10
(3) x=7,y=3
(4)