SOLUTION: Need an equation for table of values x 1,2,3,4,5,6,7,8 y 1,3,7,15,31,63,127,255 I can see that I should solve for y and that y is +2,+4,+8,+16,+32,+64,+128,+256 and that do

Question 650010: Need an equation for table of values
x 1,2,3,4,5,6,7,8
y 1,3,7,15,31,63,127,255
I can see that I should solve for y
and that y is +2,+4,+8,+16,+32,+64,+128,+256 and that doubling amount is 1 more than my y point, but can't figure how to write it up
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Notice how if you add 1 to each number in the y row, you get
2, 4, 8, 16, 32, ..
So this set of y values is the set of powers of 2, but you subtract 1 from each power of 2

So the rule is

Ex: when x = 5, y is
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