Functions  Math  8
posted by L0vely .
x: 2  4  6
y: 1  0  1
Please show me how to find the rule, thanks.
such as...
y= *equation*

as x goes up by 2, y goes down by 1, so
y = 1/2 x + c
Now plug in a point: (2,1)
1 = 1/2 (2) + c
c = 2
so, we have
y = 1/2 x + 2