What is the value of the expression? 43 • 4−5. a. 4−15 b. 4−2 c. 42 d. 48

There exist a similar question wherein the expression are this way,
                                4³ · 4^-5
To answer calculate first the value of 4 raised to the exponents. That is,
                               256 ·1/1024
Simplifying gives the answer which is equal to 4^-2. Thus, the answer is letter B. 

Where’s the graph too show me?