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y = x + 64

Step-by-step explanation:

The total # of books she has read in the first row is 67, the difference between 67 and 3 is 64.

As you look at the other rows, you see as you subtract 64, you get the same number of additional books read.

Example: 67-64=3

77-64=13

87-64=23

97-64=33

x represents the number of additional books so if you add 64 to x you get the total number which is why the answer is the 3rd option

25 questions , because they start with 100.  

350-100=250 .  

. 250/10=25

step-by-step explanation:

first take off 100, then what x 10 = 250? that is your answer. (25)