SOLUTION: Write a formula expressing the second variable in terms of the first. X 1 3 7 12 Y 1 7 19 34 Y= Thanks for your help

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Question 902584: Write a formula expressing the second variable in terms of the first.
X 1 3 7 12
Y 1 7 19 34
Y=
Thanks for your help
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
(X,Y)
(1,1)
(3,7) m = -6/-2 = 3
(7,19)
(12,34) m = -15/-5 = 3
m = 3
***Using point-slope form, y+-+y%5B1%5D+=+m%28x+-+x%5B1%5D%29 P(1,1)
Y-1 = 3(X-1)
Y = 3X - 2