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