Functions Need Help

Question

At an amusement park, a person spends $30 on admission and food, and then goes on r number of rides that
cost $2 each.

 

 

a. State the dependent and independent variables.

 

b. Write an equation in both standard and function notation forms to represent the total amount spent at the amusement
park if a person goes on anywhere from 0 to 5 rides.

Answer 1

a)

 

The independent variable is the number of rides.

The dependent variable is the cost in dollars.  This is because cost depends on the number of rides.

 

 

b)

 

y = 2r + 30    --->  standard notation

 

f(r) = 2r + 30  ---->  function notation

 

 

Answer 2

Independent Variable is r

 

The dependent variable is C which represents

amount spent at amusement park

 

C = $2r + $30    Standard form

 

f(x) = $2r + $30    function notation