The Following Graph Displays the Rate of the Production of X

The following graph displays the rate of the production of X as a function of time.
Which equation represents the slope of this line?

A) $\frac{(16 \mathrm{mmol}-10 \mathrm{mmol}) }{(7 \mathrm{~s}-4 \mathrm{~s}) }$
B) $\frac{(7 s-3 s) }{(16 \mathrm{mmol}-8 \mathrm{mmol}) }$
C) $\frac{(14 \mathrm{mmol}-6 \mathrm{~s}) }{(8 \mathrm{mmol}-3 \mathrm{~s}) }$
D) $\frac{(8 \mathrm{mmol}-16 \mathrm{mmol}) }{(3 \mathrm{~s}-7 \mathrm{~s}) }$