When a new charter school opened in 2002, there were 290 students enrolled. Write a formula for the equation N, representing the number of students attending this charter school t 2002, assuming that the student population: years after Increased by 40 students per year N = N Decreased by 28 students per year Increased by 48 students every 2 years Decreased by 44 students every 4 years Remained constant (did not change) Increased by 5 students every semester (twice each year) N = N = N = N =