Which equation represents a line which is parallel to to the line

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.

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Which of the following graphs could represent a cubic function?