What are the units of $\rm{a}$ and $\rm{b}$ in $\rm{v = a + bt}$, where unit of $\rm{v=ms ^{-1}}$ and $\rm{t =s}$

Question

Accepted Answer

$\rm{a=ms ^{-1}}$ and $\rm{b=ms ^{-2}}$

Answer

$\rm{a=ms ^{-1}}$ and $\rm{b=ms ^{-1}}$

Answer

$\rm{a=ms ^{-2}}$ and $\rm{b=ms ^{-2}}$

Answer

$\rm{a=ms ^{-2}}$ and $\rm{b=ms ^{-1}}$