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.