No her estimate is to low because if you multiply 15.5 by 12 you get 186
It looks like it counts up by 2 when adding. so add 4, then add 6, then add 8, then add 10, etc. to find the output you simply add 2 more than the last time you added, to find the input, you subtract 2 more than last time. hope this makes sense haha.
3×4= 12
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8×4=32 Thus is how you get your answer just find the GCD greatest common denominator of 3 and 8?
