If $f(x)=x^{2}-x+6$ , Evaluate the Difference Quotient $\frac{f(a+h)-f(a)}{h}$
A) $2 a-h-6$ B) $2 a-6$

Multiple Choice

If $f(x) =x^{2}-x+6$ , evaluate the difference quotient $\frac{f(a+h) -f(a) }{h}$ .

A) $2 a-h-6$
B) $2 a-6$
C) h
D) $2 a+h-6$
E) none of these