How many questions do you have to do to be able to chat with someone

What is the average rate of change for this function for the interval from x=2 to x=4 ?

How do i do this activity, is appreciated

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?