∴x=0,y=-2
That is -k+4=-2.
k=6
The expression is y=6x-2.
8.∫ Function image passing point (1, 3)
∴x= 1,y=3
That is m-4m+4=3.
m= 1/3
The analytical formula is y= 1/3x.
In this case, the function is a proportional function.
Hope to adopt! ! !