15 and one half is 31/2. 3 and seven eighths is 31/8. 31/2 also equals 124/8. Then the answer is 124/8 - 31/8 is 91/8. Hope that helped.
Y is 13 when you solve the problem
<u>Answer-</u>
The % error of this approximation is 1.64%
<u>Solution-</u>
Here,


And,


Taking (2, f(2)) as a point and slope as, f'(2), the function would be,



The value of f(2.1) will be



According to given function, f(2.1) will be,



I hope you understood....if not...comment and I will be willing to still help