Answer: choice A) 14
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The y values are 11, 25, 39, 53, 67. We add 14 to each term to get the next
Eg: 11+14 = 25
Eg: 25+14 = 39
etc
So the common difference is 14
To find this common difference, we subtract terms like so
d = (second term) - (first term) = 25 - 11 = 14
d = (third term) - (second term) = 39 - 25 = 14
d = (fourth term) - (third term) = 53 - 39 = 14
d = (fifth term) - (fourth term) = 67 - 53 = 14
we get 14 each time confirming we have the right answer
