I need Help w this question please

Which of the following graphs represents the function f(x) = 2^x

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

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers