By: Camryn Parsons

Amy and up to 5 friends want to go to the Zoo. If it costs $5.00 to get in, and each girl has $25 to spend on souvenirs, how much will they spend if she brings 1,2,3,4, and 5 friends? Remember to include Amy!

 This is one of the possible equations if f= number of friends, and c= cost of trip.  C= f(30)+30  What are the independent and dependent variables in the equation?  Is this a function?  Why or why not?

 I= The number of friends Amy brings  D= The cost of the trip  Yes, this is a function  The X-values do not repeat.  Domain= The list of X-values in a function.  Range= The list of Y-values in a function.

 D=(1,2,3,4,5)  R=(60,90,120,150,210)  Is this continuous or discrete?  Why or why not?

 This is a discrete function because it has a fixed number of x values, so the line couldn’t go on.

 Remember, the equation is C= f(30)+30  So, function notation would be f(x)= x(30)+30

X f(x)=x(30)+30 Y Coordinate Points 1 f(x)=1(30)+30 60(1,60) 2 f(x)=2(30)+30 90(2,90) 3 f(x)=3(30) (3,120) 4 f(x)=4(30) (4,150) 5 f(x)=5(30) (5,180)

 So, if Amy brings 1 friend, it will cost 60 dollars total. If she brings 2 friends, it will cost 90 dollars total. So on and so forth.

 Thanks To: america/us/tennessee/images/s/memph is-zoo.jpg mpur_national_zoo_and_aquarium.jpg