Plz help me with number 6

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?