Could anyone help with this, im terrible at geometry haha

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Bill works as a waiter and is keeping track of the tips he ears daily. about how much does bill have to earn in tips on sunday if he wants to average $22 a day? tips by day tips (dollars) monday tuesday wednesday thursday friday saturday $14 $22 $28 $36