Please answer (Only C.)

Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

What term makes it inconsistent y=2x - 4 ?

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9