Translate the Verbal Model into a Mathematical Model $\rho = 3 - s$

Multiple Choice

Translate the verbal model into a mathematical model. The perimeter P of an equilateral triangle can be found by tripling the length of one of its sides s .

A) $\rho = 3 - s$
B) $p = 3 + s$
C) $P = \frac { 3 } { s }$
D) $P = 3 s$
E) $P = \frac { s } { 3 }$