Answer:
a = 8
Explanation:
Put the given information into the function equation and solve for a.
f(x) = a/(x-h) +k . . . . for (h, k) = (4, 2) and (x, y) = (12, 3)
3 = a/(12 -4) +2 . . . . . . . givens substituted in
1 = a/8 . . . . . . subtract 2
8 = a . . . . . . . multiply by 8