2020-2021-T-Math-Gr05-T5 could you help me

The level of co2 emissions, f(x), in metric tons, from the town of fairfax x years after they started recording is shown in the table below. x 2 4 6 8 10 f(x) 26,460 29,172.15 32,162.29 35,458.93 39,093.47 select the true statement.

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

Solve for x and select the correct answer