Answer:
Only 97 is the one that's prime. The answer to the riddle is 97, so check if 79 is "ones digit is two less than my tens digit".
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The correct answer is) D. Because on the graph you can see that it increases by 25 each day which follows the equation Y=25x
The reason for this is because she reads 25 pages a night Meaning that the total number of pages Jacqueline has read (Variable Y) = 25 pages a night (x)