For the past four years, Mr. Thompson has kept a pet boa constrictor in his science classroom. At the beginning of each year, his students measure the length of the snake and record the result. The table below shows the measurements for all four years. Year Length (cm) 1 120 2 190 3 260 4 330 What is the growth pattern of the boa constrictor? It doubles in size every year. The amount it grows changes every year. It grows 70 centimeters each year. It grows 7 centimeters each year.