SOLUTION: if the funtions domain is 1,2,3,4 and the range is 3,7,11, and 15 what is the rule?

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Question 654806: if the funtions domain is 1,2,3,4 and the range is 3,7,11, and 15 what is the rule?
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

given:
Domain: 1,2,3,4
Range:3,7,11,15
to do this, easiest way is to take to pairs and find a slope:
slope+=+%287-3%29%2F%282-1%29+=+4

Note that if x+=+0, y would be -1:
so, equation will be:
y+=+4x+-+1