Ihaved been stuck on this one and i really need ?

Which facts are true for the graph of the function below? check all that apply. f(x) = log8 x

Pick the expression that matches this description: a polynomial of the 5th degree with a leading coefficient of 7 and a constant term of 6 (choice a) 7x^5+2x^2+6 (choice b) 7x^6−6x^4+5 (choice c) 6x^7−x^5+5 (choice d) 6x^5+x^4+7

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents