Answer:
f(x) = (x + 8)^2.
Step-by-step explanation:
Note if we add 8 to the x values then square the result we get y.
1 + 8 = 9 and 9^2 = 81.
4 + 8 = 12 and 12^2 = 144.
5 + 8 = 13 and 13^2 = 169.
A similar results occurs with the other values of x.
Thus, the rule is y = (x + 8)^2.
