SAT Math: Writing an Exponential Equation to Represet Population Growth

If the population of a country is currently p people, and the population doubles every year, which of the following equations models the population growth, in which y is the number of years?

Passport to Advanced MathQuadratic and exponential functions (word problems)
Product TypeSAT Math
SAT MathAlgebra and Functions
Passport to Advanced Math
Test PrepSAT Math