X 1 2 3 4
5
y 4 8 12 16 20
Given the table, write an expression for the function, and describe what it does.
A)
y=2x. y is double x.
B)
y=3x, y is triplex
y=4x. y is 4 times !
D)
y-2x+1.y is twice x plus 1.

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm