Question content area left Part 1 Determine whether f is a rational function and state its domain.
f(x) = (x³ - 6x + 1) / (8x - 7)
a. Rational function, Domain: All real numbers except 7/8
b. Rational function, Domain: All real numbers
c. Not a rational function
d. Rational function, Domain: x ≠ 0