A student measures the terminal potential difference (V) of a cell (of emf $\epsilon$ and internal) resistance r) as a function of the current (I) 0 flowing through it. The slope and intercept of the graph between V and I, then respectively equal to :

Question

( A ) $-r$ and $\epsilon $
( B ) $\epsilon$ and $-r$
( C ) $-\epsilon$ and $r$
( D ) $r$ and $-\epsilon $